diff --git a/include/parts.h b/include/parts.h
index 36b4900..8d6426c 100644
--- a/include/parts.h
+++ b/include/parts.h
@@ -30,9 +30,12 @@ void PE_SetDelegateIndex(int parts_no, int delegate_index);
 int PE_GetDelegateIndex(int parts_no);
 bool PE_SetPartsCG(int parts_no, struct string *cg_name, int sprite_deform, int state);
 bool PE_SetPartsCG_by_index(int parts_no, int cg_no, int sprite_deform, int state);
+void PE_GetPartsCGName(int parts_no, struct string **cg_name, int state);
 bool PE_SetPartsCGSurfaceArea(int parts_no, int x, int y, int w, int h, int state);
 int PE_GetPartsCGNumber(int parts_no, int state);
 bool PE_SetLoopCG_by_index(int parts_no, int cg_no, int nr_frames, int frame_time, int state);
+bool PE_SetLoopCG(int parts_no, struct string *cg_name, int start_no, int nr_frames,
+		int frame_time, int state);
 bool PE_SetLoopCGSurfaceArea(int parts_no, int x, int y, int w, int h, int state);
 bool PE_SetHGaugeCG(int parts_no, struct string *cg_name, int state);
 bool PE_SetHGaugeCG_by_index(int parts_no, int cg_no, int state);
@@ -62,6 +65,8 @@ void PE_SetZ(int parts_no, int z);
 void PE_SetShow(int parts_no, bool show);
 void PE_SetAlpha(int parts_no, int alpha);
 void PE_SetPartsDrawFilter(int PartsNumber, int DrawFilter);;
+void PE_SetAddColor(int parts_no, int r, int g, int b);
+void PE_SetMultiplyColor(int parts_no, int r, int g, int b);
 int PE_GetPartsX(int parts_no);
 int PE_GetPartsY(int parts_no);
 int PE_GetPartsZ(int parts_no);
@@ -85,6 +90,7 @@ void PE_SetPartsPixelDecide(int PartsNumber, bool PixelDecide);
 bool PE_SetThumbnailReductionSize(int ReductionSize);
 bool PE_SetThumbnailMode(bool Mode);
 bool PE_Save(struct page **buffer);
+bool PE_SaveWithoutHideParts(struct page **buffer);
 bool PE_Load(struct page **buffer);
 // GUIEngine
 int PE_GetFreeNumber(void);
@@ -123,7 +129,11 @@ bool PE_IsCursorIn(int parts_no, int mouse_x, int mouse_y, int state);
 
 // motion.c
 void PE_AddMotionPos(int parts_no, int begin_x, int begin_y, int end_x, int end_y, int begin_t, int end_t);
+void PE_AddMotionPos_curve(int parts_no, int begin_x, int begin_y, int end_x, int end_y,
+		int begin_t, int end_t, struct string *curve_name);
 void PE_AddMotionAlpha(int parts_no, int begin_a, int end_a, int begin_t, int end_t);
+void PE_AddMotionAlpha_curve(int parts_no, int begin_a, int end_a, int begin_t, int end_t,
+		struct string *curve_name);
 void PE_AddMotionCG_by_index(int parts_no, int begin_cg_no, int nr_cg, int begin_t, int end_t);
 void PE_AddMotionHGaugeRate(int parts_no, int begin_numerator, int begin_denominator,
 			    int end_numerator, int end_denominator, int begin_t, int end_t);
@@ -140,6 +150,7 @@ void PE_AddMotionSound(int sound_no, int begin_t);
 void PE_BeginMotion(void);
 void PE_EndMotion(void);
 void PE_SetMotionTime(int t);
+void PE_UpdateMotionTime(int time, bool skip);
 bool PE_IsMotion(void);
 int PE_GetMotionEndTime(void);
 
diff --git a/src/hll/GUIEngine.c b/src/hll/GUIEngine.c
index 044ce81..9d61b10 100644
--- a/src/hll/GUIEngine.c
+++ b/src/hll/GUIEngine.c
@@ -423,7 +423,6 @@ HLL_QUIET_UNIMPLEMENTED(0, int, GUIEngine, GetMessageType);
 //static void GUIEngine_Parts_SetSpeedupRateByMessageSkip(int PartsNumber, int Rate);
 //static void GUIEngine_Parts_SetResetTimerByChangeInputStatus(int PartsNumber, bool Reset, int State);
 //static void GUIEngine_Parts_SetAddColor(int PartsNumber, int nR, int nG, int nB);
-HLL_QUIET_UNIMPLEMENTED(, void, GUIEngine, Parts_SetAddColor, int parts_number, int r, int g, int b);
 //static void GUIEngine_Parts_SetMultiplyColor(int PartsNumber, int nR, int nG, int nB);
 //static void GUIEngine_Parts_SetDrag(int PartsNumber, bool Drag);
 //static void GUIEngine_Parts_SetPartsOriginPosMode(int PartsNumber, int OriginPosMode);
@@ -807,9 +806,9 @@ HLL_LIBRARY(GUIEngine,
 	    HLL_TODO_EXPORT(SetMultiTextBoxCGName, GUIEngine_SetMultiTextBoxCGName),
 	    HLL_TODO_EXPORT(GetMultiTextBoxCGName, GUIEngine_GetMultiTextBoxCGName),
 	    HLL_EXPORT(Parts_SetPartsCG, PE_SetPartsCG),
-	    HLL_TODO_EXPORT(Parts_GetPartsCGName, GUIEngine_Parts_GetPartsCGName),
+	    HLL_EXPORT(Parts_GetPartsCGName, PE_GetPartsCGName),
 	    HLL_EXPORT(Parts_SetPartsCGSurfaceArea, PE_SetPartsCGSurfaceArea),
-	    HLL_TODO_EXPORT(Parts_SetLoopCG, GUIEngine_Parts_SetLoopCG),
+	    HLL_EXPORT(Parts_SetLoopCG, PE_SetLoopCG),
 	    HLL_EXPORT(Parts_SetLoopCGSurfaceArea, PE_SetLoopCGSurfaceArea),
 	    HLL_EXPORT(Parts_SetText, PE_SetText),
 	    HLL_EXPORT(Parts_AddPartsText, PE_AddPartsText),
@@ -891,23 +890,23 @@ HLL_LIBRARY(GUIEngine,
 	    HLL_TODO_EXPORT(Parts_SetClickable, GUIEngine_Parts_SetClickable),
 	    HLL_TODO_EXPORT(Parts_SetSpeedupRateByMessageSkip, GUIEngine_Parts_SetSpeedupRateByMessageSkip),
 	    HLL_TODO_EXPORT(Parts_SetResetTimerByChangeInputStatus, GUIEngine_Parts_SetResetTimerByChangeInputStatus),
-	    HLL_EXPORT(Parts_SetAddColor, GUIEngine_Parts_SetAddColor),
-	    HLL_TODO_EXPORT(Parts_SetMultiplyColor, GUIEngine_Parts_SetMultiplyColor),
+	    HLL_EXPORT(Parts_SetAddColor, PE_SetAddColor),
+	    HLL_EXPORT(Parts_SetMultiplyColor, PE_SetMultiplyColor),
 	    HLL_TODO_EXPORT(Parts_SetDrag, GUIEngine_Parts_SetDrag),
 	    HLL_EXPORT(Parts_SetPartsOriginPosMode, PE_SetPartsOriginPosMode),
 	    HLL_EXPORT(Parts_SetParentPartsNumber, PE_SetParentPartsNumber),
 	    HLL_TODO_EXPORT(Parts_SetInputState, GUIEngine_Parts_SetInputState),
 	    HLL_TODO_EXPORT(Parts_SetOnCursorShowLinkPartsNumber, GUIEngine_Parts_SetOnCursorShowLinkPartsNumber),
-	    HLL_TODO_EXPORT(Parts_SetPartsMessageWindowShowLink, GUIEngine_Parts_SetPartsMessageWindowShowLink),
+	    HLL_EXPORT(Parts_SetPartsMessageWindowShowLink, PE_SetPartsMessageWindowShowLink),
 	    HLL_TODO_EXPORT(Parts_SetSoundNumber, GUIEngine_Parts_SetSoundNumber),
 	    HLL_TODO_EXPORT(Parts_SetClickMissSoundNumber, GUIEngine_Parts_SetClickMissSoundNumber),
-	    HLL_TODO_EXPORT(Parts_SetPartsMagX, GUIEngine_Parts_SetPartsMagX),
-	    HLL_TODO_EXPORT(Parts_SetPartsMagY, GUIEngine_Parts_SetPartsMagY),
+	    HLL_EXPORT(Parts_SetPartsMagX, PE_SetPartsMagX),
+	    HLL_EXPORT(Parts_SetPartsMagY, PE_SetPartsMagY),
 	    HLL_TODO_EXPORT(Parts_SetPartsRotateX, GUIEngine_Parts_SetPartsRotateX),
 	    HLL_TODO_EXPORT(Parts_SetPartsRotateY, GUIEngine_Parts_SetPartsRotateY),
 	    HLL_TODO_EXPORT(Parts_SetPartsRotateZ, GUIEngine_Parts_SetPartsRotateZ),
 	    HLL_TODO_EXPORT(Parts_SetPartsAlphaClipperPartsNumber, GUIEngine_Parts_SetPartsAlphaClipperPartsNumber),
-	    HLL_TODO_EXPORT(Parts_SetPartsPixelDecide, GUIEngine_Parts_SetPartsPixelDecide),
+	    HLL_EXPORT(Parts_SetPartsPixelDecide, PE_SetPartsPixelDecide),
 	    HLL_EXPORT(Parts_GetPartsX, PE_GetPartsX),
 	    HLL_EXPORT(Parts_GetPartsY, PE_GetPartsY),
 	    HLL_EXPORT(Parts_GetPartsZ, PE_GetPartsZ),
@@ -939,8 +938,8 @@ HLL_LIBRARY(GUIEngine,
 	    HLL_TODO_EXPORT(Parts_GetPartsUpperLeftPosY, GUIEngine_Parts_GetPartsUpperLeftPosY),
 	    HLL_EXPORT(Parts_GetPartsWidth, PE_GetPartsWidth),
 	    HLL_EXPORT(Parts_GetPartsHeight, PE_GetPartsHeight),
-	    HLL_TODO_EXPORT(Parts_AddMotionPos, GUIEngine_Parts_AddMotionPos),
-	    HLL_TODO_EXPORT(Parts_AddMotionAlpha, GUIEngine_Parts_AddMotionAlpha),
+	    HLL_EXPORT(Parts_AddMotionPos, PE_AddMotionPos_curve),
+	    HLL_EXPORT(Parts_AddMotionAlpha, PE_AddMotionAlpha_curve),
 	    HLL_TODO_EXPORT(Parts_AddMotionCG, GUIEngine_Parts_AddMotionCG),
 	    HLL_TODO_EXPORT(Parts_AddMotionCGTermination, GUIEngine_Parts_AddMotionCGTermination),
 	    HLL_TODO_EXPORT(Parts_AddMotionHGaugeRate, GUIEngine_Parts_AddMotionHGaugeRate),
@@ -958,11 +957,11 @@ HLL_LIBRARY(GUIEngine,
 	    HLL_TODO_EXPORT(Parts_SetThumbnailReductionSize, GUIEngine_Parts_SetThumbnailReductionSize),
 	    HLL_TODO_EXPORT(Parts_SetThumbnailMode, GUIEngine_Parts_SetThumbnailMode),
 	    HLL_TODO_EXPORT(GetClickNumber, GUIEngine_GetClickNumber),
-	    HLL_TODO_EXPORT(Parts_BeginMotion, GUIEngine_Parts_BeginMotion),
-	    HLL_TODO_EXPORT(Parts_EndMotion, GUIEngine_Parts_EndMotion),
-	    HLL_TODO_EXPORT(Parts_IsMotion, GUIEngine_Parts_IsMotion),
+	    HLL_EXPORT(Parts_BeginMotion, PE_BeginMotion),
+	    HLL_EXPORT(Parts_EndMotion, PE_EndMotion),
+	    HLL_EXPORT(Parts_IsMotion, PE_IsMotion),
 	    HLL_TODO_EXPORT(Parts_SeekEndMotion, GUIEngine_Parts_SeekEndMotion),
-	    HLL_TODO_EXPORT(Parts_UpdateMotionTime, GUIEngine_Parts_UpdateMotionTime),
-	    HLL_TODO_EXPORT(Save, GUIEngine_Save),
-	    HLL_TODO_EXPORT(SaveWithoutHideParts, GUIEngine_SaveWithoutHideParts),
+	    HLL_EXPORT(Parts_UpdateMotionTime, PE_UpdateMotionTime),
+	    HLL_EXPORT(Save, PE_Save),
+	    HLL_EXPORT(SaveWithoutHideParts, PE_SaveWithoutHideParts),
 	    HLL_TODO_EXPORT(Load, GUIEngine_Load));
diff --git a/src/hll/IbisInputEngine.c b/src/hll/IbisInputEngine.c
index ef0e205..2d21387 100644
--- a/src/hll/IbisInputEngine.c
+++ b/src/hll/IbisInputEngine.c
@@ -17,9 +17,11 @@
 #include "hll.h"
 #include "sact.h"
 
-//bool Mouse_HideCursorByGame(bool Hide);
+//bool Mouse_MovePosImmediately(int x, int y);
+//bool Mouse_HideCursorByGame(bool hide);
 //bool Mouse_IsHideCursorByGame(void);
 //void Mouse_HideByStepMessage(void);
+HLL_QUIET_UNIMPLEMENTED(, void, IbisInputEngine, Mouse_HideByStepMessage);
 //void MouseWheel_ClearCount(void);
 HLL_QUIET_UNIMPLEMENTED(, void, IbisInputEngine, MouseWheel_ClearCount);
 
@@ -49,6 +51,10 @@ HLL_WARN_UNIMPLEMENTED(0.0, float, IbisInputEngine, Joystick_GetAxis, int dev, i
 
 HLL_LIBRARY(IbisInputEngine,
 	    HLL_EXPORT(Mouse_GetPos, sact_Mouse_GetPos),
+	    HLL_TODO_EXPORT(Mouse_MovePosImmediately, IbisInputEngine_Mouse_MovePosImmediately),
+	    HLL_TODO_EXPORT(Mouse_HideCursorByGame, IbisInputEngine_Mouse_HideCursorByGame),
+	    HLL_TODO_EXPORT(Mouse_IsHideCursorByGame, IbisInputEngine_Mouse_IsHideCursorByGame),
+	    HLL_EXPORT(Mouse_HideByStepMessage, IbisInputEngine_Mouse_HideByStepMessage),
 	    HLL_EXPORT(MouseWheel_ClearCount, IbisInputEngine_MouseWheel_ClearCount),
 	    HLL_EXPORT(MouseWheel_GetCount, IbisInputEngine_MouseWheel_GetCount),
 	    HLL_EXPORT(Key_IsDown, sact_Key_IsDown),
diff --git a/src/parts/construction.c b/src/parts/construction.c
index eae7e5b..9ce5bc6 100644
--- a/src/parts/construction.c
+++ b/src/parts/construction.c
@@ -200,7 +200,7 @@ static void build_create(struct parts *parts, struct parts_construction_process
 		struct parts_cp_create *op)
 {
 	gfx_delete_texture(&cproc->common.texture);
-	gfx_init_texture_rgba(&cproc->common.texture, op->w, op->h, (SDL_Color){0,0,0,0});
+	gfx_init_texture_rgba(&cproc->common.texture, op->w, op->h, (SDL_Color){0,0,0,255});
 	parts_set_dims(parts, &cproc->common, op->w, op->h);
 }
 
@@ -230,12 +230,15 @@ static void build_fill_alpha_color(struct parts_construction_process *cproc,
 
 static void build_draw_text(struct parts_construction_process *cproc, struct parts_cp_text *op)
 {
-	// FIXME: this should set alpha to 0 in text area
 	gfx_render_text(&cproc->common.texture, op->x, op->y, op->text->text, &op->style);
 }
 
 static void build_copy_text(struct parts_construction_process *cproc, struct parts_cp_text *op)
 {
+	int w = ceilf(gfx_size_text (&op->style, op->text->text));
+	int h = ceilf(op->style.size + op->style.edge_up + op->style.edge_down);
+	gfx_fill_with_alpha(&cproc->common.texture, op->x, op->y, w, h,
+			op->style.edge_color.r, op->style.edge_color.g, op->style.edge_color.b, 0);
 	gfx_render_text(&cproc->common.texture, op->x, op->y, op->text->text, &op->style);
 }
 
@@ -278,7 +281,8 @@ bool PE_SetPartsConstructionSurfaceArea(int parts_no, int x, int y, int w, int h
 	if (!parts_state_valid(--state))
 		return false;
 
-	struct parts_construction_process *cproc = get_cproc(parts_no, state);
-	parts_set_surface_area(&cproc->common, x, y, w, h);
+	struct parts *parts = parts_get(parts_no);
+	struct parts_construction_process *cproc = parts_get_construction_process(parts, state);
+	parts_set_surface_area(parts, &cproc->common, x, y, w, h);
 	return true;
 }
diff --git a/src/parts/debug.c b/src/parts/debug.c
index c17eba3..6efddad 100644
--- a/src/parts/debug.c
+++ b/src/parts/debug.c
@@ -139,6 +139,10 @@ static void parts_construction_process_print(struct parts_construction_process *
 
 static void parts_print_state(struct parts_state *state, int indent)
 {
+	if (state->type == PARTS_UNINITIALIZED) {
+		printf("UNINITIALIZED");
+		return;
+	}
 	printf("{\n");
 	indent++;
 
@@ -304,7 +308,7 @@ static void _parts_print(struct parts *parts, int indent)
 	} else {
 		indent_printf(indent, "children = {\n");
 		struct parts *child;
-		TAILQ_FOREACH(child, &parts->children, parts_list_entry) {
+		PARTS_FOREACH_CHILD(child, parts) {
 			_parts_print(child, indent+1);
 			printf(",\n");
 		}
@@ -324,8 +328,9 @@ void parts_print(struct parts *parts)
 void parts_engine_print(void)
 {
 	struct parts *parts;
-	TAILQ_FOREACH(parts, &parts_list, parts_list_entry) {
-		parts_print(parts);
+	PARTS_LIST_FOREACH(parts) {
+		if (parts->parent < 0)
+			parts_print(parts);
 	}
 }
 
@@ -357,25 +362,25 @@ static void parts_list_print(struct parts *parts, int indent)
 	struct parts_state *state = &parts->states[parts->state];
 	switch (state->type) {
 	case PARTS_UNINITIALIZED:
-		printf("(uninitialized)\n");
+		printf("(uninitialized)");
 		break;
 	case PARTS_CG:
-		printf("(cg %d)\n", state->cg.no);
+		printf("(cg %d)", state->cg.no);
 		break;
 	case PARTS_TEXT:
-		printf("(text)\n"); // TODO? store actual text and print it here
+		printf("(text)"); // TODO? store actual text and print it here
 		break;
 	case PARTS_ANIMATION:
-		printf("(animation %d+%d)\n", state->anim.cg_no, state->anim.nr_frames);
+		printf("(animation %d+%d)", state->anim.cg_no, state->anim.nr_frames);
 		break;
 	case PARTS_NUMERAL:
-		printf("(numeral %d)\n", state->num.cg_no);
+		printf("(numeral %d)", state->num.cg_no);
 		break;
 	case PARTS_HGAUGE:
-		printf("(hgauge)\n"); // TODO? store rate and cg and print them here
+		printf("(hgauge)"); // TODO? store rate and cg and print them here
 		break;
 	case PARTS_VGAUGE:
-		printf("(vgauge)\n");
+		printf("(vgauge)");
 		break;
 	case PARTS_CONSTRUCTION_PROCESS: {
 		printf("(construction process:");
@@ -402,13 +407,15 @@ static void parts_list_print(struct parts *parts, int indent)
 				break;
 			}
 		}
-		printf(")\n");
+		printf(")");
 		break;
 	}
 	}
 
+	printf(" @ z=%d\n", parts->z);
+
 	struct parts *child;
-	TAILQ_FOREACH(child, &parts->children, parts_list_entry) {
+	PARTS_FOREACH_CHILD(child, parts) {
 		parts_list_print(child, indent + 1);
 	}
 }
@@ -416,8 +423,9 @@ static void parts_list_print(struct parts *parts, int indent)
 static void parts_cmd_parts_list(unsigned nr_args, char **args)
 {
 	struct parts *parts;
-	TAILQ_FOREACH(parts, &parts_list, parts_list_entry) {
-		parts_list_print(parts, 0);
+	PARTS_LIST_FOREACH(parts) {
+		if (parts->parent < 0)
+			parts_list_print(parts, 0);
 	}
 }
 
diff --git a/src/parts/input.c b/src/parts/input.c
index 2585c36..c296325 100644
--- a/src/parts/input.c
+++ b/src/parts/input.c
@@ -80,7 +80,7 @@ void PE_UpdateInputState(possibly_unused int passed_time)
 	mouse_get_pos(&cur_pos.x, &cur_pos.y);
 
 	struct parts *parts;
-	TAILQ_FOREACH(parts, &parts_list, parts_list_entry) {
+	PARTS_LIST_FOREACH(parts) {
 		parts_update_mouse(parts, cur_pos, cur_clicking);
 	}
 
@@ -174,6 +174,19 @@ bool PE_IsCursorIn(int parts_no, int mouse_x, int mouse_y, int state)
 	if (!parts_state_valid(--state))
 		return false;
 
-	// TODO
-	return false;
+	struct parts *parts = parts_try_get(parts_no);
+	if (!parts)
+		return false;
+
+	// TODO: this could be cached
+	Rectangle hitbox = parts->states[state].common.hitbox;
+	struct parts *parent = parts;
+	while (parent->parent >= 0) {
+		parent = parts_get(parent->parent);
+		hitbox.x += parent->pos.x;
+		hitbox.y += parent->pos.y;
+	}
+
+	Point mouse_pos = { mouse_x, mouse_y };
+	return SDL_PointInRect(&mouse_pos, &hitbox);
 }
diff --git a/src/parts/motion.c b/src/parts/motion.c
index 3fba7e3..4a06001 100644
--- a/src/parts/motion.c
+++ b/src/parts/motion.c
@@ -15,6 +15,7 @@
  */
 
 #include "system4.h"
+#include "system4/string.h"
 
 #include "audio.h"
 #include "xsystem4.h"
@@ -162,10 +163,10 @@ static void parts_update_with_motion(struct parts *parts, struct parts_motion *m
 	}
 }
 
-static void parts_list_update_motion(struct parts_list *list)
+static void parts_update_all_motion(void)
 {
 	struct parts *parts;
-	TAILQ_FOREACH(parts, list, parts_list_entry) {
+	PARTS_LIST_FOREACH(parts) {
 		struct parts_motion *motion;
 		TAILQ_FOREACH(motion, &parts->motion, entry) {
 			if (motion->begin_time > motion_t)
@@ -175,13 +176,7 @@ static void parts_list_update_motion(struct parts_list *list)
 			//        at the end-state of the second motion.
 			parts_update_with_motion(parts, motion);
 		}
-		parts_list_update_motion(&parts->children);
 	}
-}
-
-static void parts_update_all_motion(void)
-{
-	parts_list_update_motion(&parts_list);
 
 	struct sound_motion *sound;
 	TAILQ_FOREACH(sound, &sound_motion_list, entry) {
@@ -198,10 +193,10 @@ static void parts_update_all_motion(void)
  * NOTE: If a motion begins at e.g. t=100 with a value of v=0, then that value
  *       becomes the initial value of v at t=0.
  */
-static void parts_list_init_all_motion(struct parts_list *list)
+static void parts_init_all_motion(void)
 {
 	struct parts *parts;
-	TAILQ_FOREACH(parts, list, parts_list_entry) {
+	PARTS_LIST_FOREACH(parts) {
 		struct parts_motion *motion;
 		bool initialized[PARTS_NR_MOTION_TYPES] = {0};
 		TAILQ_FOREACH(motion, &parts->motion, entry) {
@@ -213,18 +208,12 @@ static void parts_list_init_all_motion(struct parts_list *list)
 	}
 }
 
-static void parts_list_fini_all_motion(struct parts_list *list)
-{
-	struct parts *parts;
-	TAILQ_FOREACH(parts, list, parts_list_entry) {
-		parts_clear_motion(parts);
-		parts_list_fini_all_motion(&parts->children);
-	}
-}
-
 static void parts_fini_all_motion(void)
 {
-	parts_list_fini_all_motion(&parts_list);
+	struct parts *parts;
+	PARTS_LIST_FOREACH(parts) {
+		parts_clear_motion(parts);
+	}
 
 	while (!TAILQ_EMPTY(&sound_motion_list)) {
 		struct sound_motion *motion = TAILQ_FIRST(&sound_motion_list);
@@ -244,6 +233,13 @@ void PE_AddMotionPos(int parts_no, int begin_x, int begin_y, int end_x, int end_
 	parts_add_motion(parts, motion);
 }
 
+void PE_AddMotionPos_curve(int parts_no, int begin_x, int begin_y, int end_x, int end_y,
+		int begin_t, int end_t, struct string *curve_name)
+{
+	// TODO: use curve
+	PE_AddMotionPos(parts_no, begin_x, begin_y, end_x, end_y, begin_t, end_t);
+}
+
 void PE_AddMotionAlpha(int parts_no, int begin_a, int end_a, int begin_t, int end_t)
 {
 	struct parts *parts = parts_get(parts_no);
@@ -253,6 +249,13 @@ void PE_AddMotionAlpha(int parts_no, int begin_a, int end_a, int begin_t, int en
 	parts_add_motion(parts, motion);
 }
 
+void PE_AddMotionAlpha_curve(int parts_no, int begin_a, int end_a, int begin_t, int end_t,
+		struct string *curve_name)
+{
+	// TODO: use curve
+	PE_AddMotionAlpha(parts_no, begin_a, end_a, begin_t, end_t);
+}
+
 void PE_AddMotionCG_by_index(int parts_no, int begin_cg_no, int nr_cg, int begin_t, int end_t)
 {
 	struct parts *parts = parts_get(parts_no);
@@ -372,7 +375,7 @@ void PE_BeginMotion(void)
 	// FIXME: starting a motion seems to clear non-default states
 	motion_t = 0;
 	is_motion = true;
-	parts_list_init_all_motion(&parts_list);
+	parts_init_all_motion();
 }
 
 void PE_EndMotion(void)
@@ -397,6 +400,12 @@ void PE_SetMotionTime(int t)
 		PE_EndMotion();
 }
 
+void PE_UpdateMotionTime(int time, possibly_unused bool skip)
+{
+	// TODO: use skip
+	PE_SetMotionTime(motion_t + time);
+}
+
 bool PE_IsMotion(void)
 {
 	return is_motion;
diff --git a/src/parts/parts.c b/src/parts/parts.c
index d468598..9580b53 100644
--- a/src/parts/parts.c
+++ b/src/parts/parts.c
@@ -37,6 +37,7 @@ static void parts_init(struct parts *parts)
 	parts->origin_mode = 1;
 	parts->z = 1;
 	parts->show = true;
+	parts->alpha = 255;
 	parts->parent = -1;
 	parts->linked_to = -1;
 	parts->linked_from = -1;
@@ -56,19 +57,33 @@ static struct parts *parts_alloc(void)
 	return parts;
 }
 
-static void parts_list_insert(struct parts_list *list, struct parts *parts)
+static void parts_list_insert(struct parts *parts)
 {
 	struct parts *p;
-	TAILQ_FOREACH(p, list, parts_list_entry) {
+	PARTS_LIST_FOREACH(p) {
 		if (p->z >= parts->z) {
 			TAILQ_INSERT_BEFORE(p, parts, parts_list_entry);
 			return;
 		}
 	}
-	TAILQ_INSERT_TAIL(list, parts, parts_list_entry);
+	TAILQ_INSERT_TAIL(&parts_list, parts, parts_list_entry);
 	parts_engine_dirty();
 }
 
+static void parts_set_parent(struct parts *child, struct parts *parent)
+{
+	if (child->parent >= 0) {
+		struct parts *old_parent = parts_get(child->parent);
+		TAILQ_REMOVE(&old_parent->children, child, child_list_entry);
+	}
+	if (parent) {
+		TAILQ_INSERT_TAIL(&parent->children, child, child_list_entry);
+		child->parent = parent->no;
+	} else {
+		child->parent = -1;
+	}
+}
+
 struct parts *parts_try_get(int parts_no)
 {
 	struct ht_slot *slot = ht_put_int(parts_table, parts_no, NULL);
@@ -86,7 +101,7 @@ struct parts *parts_get(int parts_no)
 	struct parts *parts = parts_alloc();
 	parts->no = parts_no;
 	slot->value = parts;
-	parts_list_insert(&parts_list, parts);
+	parts_list_insert(parts);
 	return parts;
 }
 
@@ -95,16 +110,9 @@ bool parts_exists(int parts_no)
 	return !!ht_get_int(parts_table, parts_no, NULL);
 }
 
-static struct parts_list *parts_get_list(struct parts *parts)
+static void parts_list_remove(struct parts *parts)
 {
-	if (parts->parent < 0)
-		return &parts_list;
-	return &parts_get(parts->parent)->children;
-}
-
-static void parts_list_remove(struct parts_list *list, struct parts *parts)
-{
-	TAILQ_REMOVE(list, parts, parts_list_entry);
+	TAILQ_REMOVE(&parts_list, parts, parts_list_entry);
 }
 
 static void parts_state_free(struct parts_state *state)
@@ -114,6 +122,8 @@ static void parts_state_free(struct parts_state *state)
 		break;
 	case PARTS_CG:
 		gfx_delete_texture(&state->common.texture);
+		if (state->cg.name)
+			free_string(state->cg.name);
 		break;
 	case PARTS_TEXT:
 		gfx_delete_texture(&state->common.texture);
@@ -123,6 +133,7 @@ static void parts_state_free(struct parts_state *state)
 		for (unsigned i = 0; i < state->anim.nr_frames; i++) {
 			gfx_delete_texture(&state->anim.frames[i]);
 		}
+		free(state->anim.frames);
 		break;
 	case PARTS_NUMERAL:
 		gfx_delete_texture(&state->common.texture);
@@ -256,12 +267,22 @@ static Point calculate_offset(int mode, int w, int h)
 static void parts_common_recalculate_hitbox(struct parts *parts, struct parts_common *common)
 {
 	common->origin_offset = calculate_offset(parts->origin_mode, common->w, common->h);
-	common->hitbox = (Rectangle) {
-		.x = parts->pos.x + common->origin_offset.x,
-		.y = parts->pos.y + common->origin_offset.y,
-		.w = common->w,
-		.h = common->h,
-	};
+
+	if (common->surface_area.w || common->surface_area.h) {
+		Rectangle r = { 0, 0, common->w, common->h };
+		SDL_IntersectRect(&r, &common->surface_area, &common->hitbox);
+		common->origin_offset.x -= common->surface_area.x;
+		common->origin_offset.y -= common->surface_area.y;
+		common->hitbox.x += parts->pos.x + common->origin_offset.x;
+		common->hitbox.y += parts->pos.y + common->origin_offset.y;
+	} else {
+		common->hitbox = (Rectangle) {
+			.x = parts->pos.x + common->origin_offset.x,
+			.y = parts->pos.y + common->origin_offset.y,
+			.w = common->w,
+			.h = common->h,
+		};
+	}
 }
 
 static void parts_recalculate_hitbox(struct parts *parts)
@@ -327,7 +348,7 @@ void parts_set_alpha(struct parts *parts, int alpha)
 	parts_dirty(parts);
 }
 
-static bool parts_set_cg(struct parts *parts, struct cg *cg, int cg_no, int state)
+static bool parts_set_cg(struct parts *parts, struct cg *cg, int cg_no, struct string *name, int state)
 {
 	if (!cg)
 		return false;
@@ -336,6 +357,9 @@ static bool parts_set_cg(struct parts *parts, struct cg *cg, int cg_no, int stat
 	gfx_init_texture_with_cg(&parts_cg->common.texture, cg);
 	parts_set_dims(parts, &parts_cg->common, cg->metrics.w, cg->metrics.h);
 	parts_cg->no = cg_no;
+	if (parts_cg->name)
+		free_string(parts_cg->name);
+	parts_cg->name = name;
 	parts_dirty(parts);
 	cg_free(cg);
 	return true;
@@ -348,7 +372,7 @@ bool parts_set_cg_by_index(struct parts *parts, int cg_no, int state)
 		parts_dirty(parts);
 		return true;
 	}
-	return parts_set_cg(parts, asset_cg_load(cg_no), cg_no, state);
+	return parts_set_cg(parts, asset_cg_load(cg_no), cg_no, NULL, state);
 }
 
 bool parts_set_cg_by_name(struct parts *parts, struct string *cg_name, int state)
@@ -360,7 +384,7 @@ bool parts_set_cg_by_name(struct parts *parts, struct string *cg_name, int state
 	}
 	int no;
 	struct cg *cg = asset_cg_load_by_name(cg_name->text, &no);
-	return parts_set_cg(parts, cg, no, state);
+	return parts_set_cg(parts, cg, no, string_dup(cg_name), state);
 }
 
 void parts_set_hgauge_rate(struct parts *parts, float rate, int state)
@@ -467,9 +491,12 @@ void parts_set_state(struct parts *parts, enum parts_state_type state)
 	}
 }
 
-void parts_set_surface_area(struct parts_common *common, int x, int y, int w, int h)
+void parts_set_surface_area(struct parts *parts, struct parts_common *common, int x, int y, int w, int h)
 {
+	if (x < 0 || y < 0)
+		return;
 	common->surface_area = (Rectangle) { x, y, w, h };
+	parts_common_recalculate_hitbox(parts, common);
 }
 
 static void parts_update_loop(struct parts *parts, int passed_time)
@@ -498,7 +525,7 @@ static void parts_update_loop(struct parts *parts, int passed_time)
 static void parts_update_animation(int passed_time)
 {
 	struct parts *parts;
-	TAILQ_FOREACH(parts, &parts_list, parts_list_entry) {
+	PARTS_LIST_FOREACH(parts) {
 		parts_update_loop(parts, passed_time);
 	}
 }
@@ -515,14 +542,14 @@ void parts_release(int parts_no)
 		parts_state_free(&parts->states[i]);
 	}
 
+	// break parent/child relationships
 	while (!TAILQ_EMPTY(&parts->children)) {
 		struct parts *child = TAILQ_FIRST(&parts->children);
-		child->parent = -1;
-		parts_list_remove(&parts->children, child);
-		parts_list_insert(&parts_list, child);
+		parts_set_parent(child, NULL);
 	}
+	parts_set_parent(parts, NULL);
 
-	parts_list_remove(parts_get_list(parts), parts);
+	parts_list_remove(parts);
 	free(parts);
 	slot->value = NULL;
 	parts_engine_dirty();
@@ -575,59 +602,65 @@ int PE_GetDelegateIndex(int parts_no)
 
 bool PE_SetPartsCG(int parts_no, struct string *cg_name, possibly_unused int sprite_deform, int state)
 {
-	if (!parts_state_valid(--state)) {
-		WARNING("Invalid parts state: %d", state);
+	if (!parts_state_valid(--state))
 		return false;
-	}
 	return parts_set_cg_by_name(parts_get(parts_no), cg_name, state);
 }
 
 bool PE_SetPartsCG_by_index(int parts_no, int cg_no, possibly_unused int sprite_deform, int state)
 {
-	if (!parts_state_valid(--state)) {
-		WARNING("Invalid parts state: %d", state);
+	if (!parts_state_valid(--state))
 		return false;
-	}
 	return parts_set_cg_by_index(parts_get(parts_no), cg_no, state);
 }
 
+void PE_GetPartsCGName(int parts_no, struct string **cg_name, int state)
+{
+	if (!parts_state_valid(--state))
+		return;
+	struct parts_cg *cg = parts_get_cg(parts_get(parts_no), state);
+	if (cg->name) {
+		if (*cg_name)
+			free_string(*cg_name);
+		*cg_name = string_dup(cg->name);
+	}
+}
+
 bool PE_SetPartsCGSurfaceArea(int parts_no, int x, int y, int w, int h, int state)
 {
-	if (!parts_state_valid(--state)) {
-		WARNING("Invalid parts state: %d", state);
+	if (!parts_state_valid(--state))
 		return false;
-	}
 
-	struct parts_cg *cg = parts_get_cg(parts_get(parts_no), state);
-	parts_set_surface_area(&cg->common, x, y, w, h);
+	struct parts *parts = parts_get(parts_no);
+	struct parts_cg *cg = parts_get_cg(parts, state);
+	parts_set_surface_area(parts, &cg->common, x, y, w, h);
 	return true;
 }
 
 int PE_GetPartsCGNumber(int parts_no, int state)
 {
 	if (!parts_state_valid(--state)) {
-		WARNING("Invalid parts state: %d", state);
 		return false;
 	}
 
 	return parts_get_cg(parts_get(parts_no), state)->no;
 }
 
-bool PE_SetLoopCG_by_index(int parts_no, int cg_no, int nr_frames, int frame_time, int state)
+static bool set_loop_cg(int parts_no, int start_no, int nr_frames, int frame_time, int state,
+		struct cg *(*load_cg)(int no, void *data), void *data)
 {
-	if (!parts_state_valid(--state)) {
-		WARNING("Invalid parts state: %d", state);
+	if (!parts_state_valid(--state))
 		return false;
-	}
 	if (nr_frames <= 0 || nr_frames > 10000) {
 		WARNING("Invalid frame count: %d", nr_frames);
+		return false;
 	}
 
 	int w = 0, h = 0;
 	struct parts *parts = parts_get(parts_no);
 	Texture *frames = xcalloc(nr_frames, sizeof(Texture));
 	for (int i = 0; i < nr_frames; i++) {
-		struct cg *cg = asset_cg_load(cg_no + i);
+		struct cg *cg = load_cg(start_no + i, data);
 		if (!cg) {
 			for (int j = 0; j < i; j++) {
 				gfx_delete_texture(&frames[j]);
@@ -643,13 +676,41 @@ bool PE_SetLoopCG_by_index(int parts_no, int cg_no, int nr_frames, int frame_tim
 
 	struct parts_animation *anim = parts_get_animation(parts, state);
 	parts_set_dims(parts, &anim->common, w, h);
-	anim->frames = frames; // free previous value?
+	free(anim->frames);
+	anim->frames = frames;
 	anim->nr_frames = nr_frames;
 	anim->frame_time = frame_time;
 	anim->elapsed = 0;
 	anim->current_frame = 0;
 	anim->common.texture = frames[0];
 	return true;
+
+}
+
+static struct cg *load_loop_cg_by_index(int no, void *_)
+{
+	return asset_cg_load(no);
+}
+
+bool PE_SetLoopCG_by_index(int parts_no, int cg_no, int nr_frames, int frame_time, int state)
+{
+	return set_loop_cg(parts_no, cg_no, nr_frames, frame_time, state,
+			load_loop_cg_by_index, NULL);
+}
+
+static struct cg *load_loop_cg_by_name(int no, void *data)
+{
+	int unused_no;
+	struct string *cg_name = string_format((struct string*)data, (union vm_value){.i=no});
+	struct cg *cg = asset_cg_load_by_name(cg_name->text, &unused_no);
+	free_string(cg_name);
+	return cg;
+}
+
+bool PE_SetLoopCG(int parts_no, struct string *cg_name, int start_no, int nr_frames, int frame_time, int state)
+{
+	return set_loop_cg(parts_no, start_no, nr_frames, frame_time, state,
+			load_loop_cg_by_name, cg_name);
 }
 
 bool PE_SetLoopCGSurfaceArea(int parts_no, int x, int y, int w, int h, int state)
@@ -659,8 +720,9 @@ bool PE_SetLoopCGSurfaceArea(int parts_no, int x, int y, int w, int h, int state
 		return false;
 	}
 
-	struct parts_animation *anim = parts_get_animation(parts_get(parts_no), state);
-	parts_set_surface_area(&anim->common, x, y, w, h);
+	struct parts *parts = parts_get(parts_no);
+	struct parts_animation *anim = parts_get_animation(parts, state);
+	parts_set_surface_area(parts, &anim->common, x, y, w, h);
 	return true;
 }
 
@@ -719,8 +781,9 @@ bool PE_SetHGaugeSurfaceArea(int parts_no, int x, int y, int w, int h, int state
 	if (!parts_state_valid(--state))
 		return false;
 
-	struct parts_gauge *g = parts_get_hgauge(parts_get(parts_no), state);
-	parts_set_surface_area(&g->common, x, y, w, h);
+	struct parts *parts = parts_get(parts_no);
+	struct parts_gauge *g = parts_get_hgauge(parts, state);
+	parts_set_surface_area(parts, &g->common, x, y, w, h);
 	return true;
 }
 
@@ -759,8 +822,9 @@ bool PE_SetVGaugeSurfaceArea(int parts_no, int x, int y, int w, int h, int state
 	if (!parts_state_valid(--state))
 		return false;
 
-	struct parts_gauge *g = parts_get_vgauge(parts_get(parts_no), state);
-	parts_set_surface_area(&g->common, x, y, w, h);
+	struct parts *parts = parts_get(parts_no);
+	struct parts_gauge *g = parts_get_vgauge(parts, state);
+	parts_set_surface_area(parts, &g->common, x, y, w, h);
 	return true;
 }
 
@@ -849,8 +913,9 @@ bool PE_SetNumeralSurfaceArea(int parts_no, int x, int y, int w, int h, int stat
 	if (!parts_state_valid(--state))
 		return false;
 
-	struct parts_numeral *n = parts_get_numeral(parts_get(parts_no), state);
-	parts_set_surface_area(&n->common, x, y, w, h);
+	struct parts *parts = parts_get(parts_no);
+	struct parts_numeral *n = parts_get_numeral(parts, state);
+	parts_set_surface_area(parts, &n->common, x, y, w, h);
 	return true;
 }
 
@@ -893,9 +958,8 @@ void PE_SetZ(int parts_no, int z)
 	struct parts *parts = parts_get(parts_no);
 	parts->z = z;
 
-	struct parts_list *list = parts_get_list(parts);
-	parts_list_remove(list, parts);
-	parts_list_insert(list, parts);
+	parts_list_remove(parts);
+	parts_list_insert(parts);
 }
 
 void PE_SetShow(int parts_no, bool show)
@@ -913,8 +977,16 @@ void PE_SetAlpha(int parts_no, int alpha)
 }
 
 void PE_SetPartsDrawFilter(int PartsNumber, int DrawFilter);
-void PE_SetAddColor(int PartsNumber, int nR, int nG, int nB);
-void PE_SetMultiplyColor(int PartsNumber, int nR, int nG, int nB);
+
+void PE_SetAddColor(int parts_no, int r, int g, int b)
+{
+	//NOTICE("PE_SetAddColor(%d, %d, %d, %d)", parts_no, r, g, b);
+}
+
+void PE_SetMultiplyColor(int parts_no, int r, int g, int b)
+{
+	//NOTICE("PE_SetMultiplyColor(%d, %d, %d, %d)", parts_no, r, g, b);
+}
 
 int PE_GetPartsX(int parts_no)
 {
@@ -972,9 +1044,7 @@ void PE_SetParentPartsNumber(int parts_no, int parent_parts_no)
 	if (parts->parent == parent_parts_no)
 		return;
 
-	parts_list_remove(parts_get_list(parts), parts);
-	parts_list_insert(&parts_get(parent_parts_no)->children, parts);
-	parts->parent = parent_parts_no;
+	parts_set_parent(parts, parts_get(parent_parts_no));
 }
 
 bool PE_SetPartsGroupNumber(possibly_unused int PartsNumber, possibly_unused int GroupNumber)
@@ -1009,7 +1079,12 @@ void PE_SetPartsRotateZ(int parts_no, float rot_z)
 }
 
 void PE_SetPartsAlphaClipperPartsNumber(int PartsNumber, int AlphaClipperPartsNumber);
-void PE_SetPartsPixelDecide(int PartsNumber, bool PixelDecide);
+
+void PE_SetPartsPixelDecide(int parts_no, bool pixel_decide)
+{
+	//NOTICE("PE_SetPartsPixelDecide(%d, %s)", parts_no, pixel_decide ? "true" : "false");
+}
+
 bool PE_SetThumbnailReductionSize(int ReductionSize);
 bool PE_SetThumbnailMode(bool Mode);
 
@@ -1024,6 +1099,17 @@ bool PE_Save(struct page **buffer)
 	return true;
 }
 
+bool PE_SaveWithoutHideParts(struct page **buffer)
+{
+	// TODO
+	if (*buffer) {
+		delete_page_vars(*buffer);
+		free_page(*buffer);
+	}
+	*buffer = NULL;
+	return true;
+}
+
 bool PE_Load(possibly_unused struct page **buffer)
 {
 	// TODO
diff --git a/src/parts/parts_internal.h b/src/parts/parts_internal.h
index 2582052..1833bf1 100644
--- a/src/parts/parts_internal.h
+++ b/src/parts/parts_internal.h
@@ -98,6 +98,7 @@ struct parts_common {
 struct parts_cg {
 	struct parts_common common;
 	int no;
+	struct string *name;
 };
 
 struct parts_text {
@@ -199,6 +200,7 @@ struct parts {
 	enum parts_state_type state;
 	struct parts_state states[PARTS_NR_STATES];
 	TAILQ_ENTRY(parts) parts_list_entry;
+	TAILQ_ENTRY(parts) child_list_entry;
 	struct parts_list children;
 	int no;
 	int delegate_index;
@@ -219,6 +221,9 @@ struct parts {
 	TAILQ_HEAD(, parts_motion) motion;
 };
 
+#define PARTS_LIST_FOREACH(iter) TAILQ_FOREACH(iter, &parts_list, parts_list_entry)
+#define PARTS_FOREACH_CHILD(iter, parent) TAILQ_FOREACH(iter, &parent->children, child_list_entry)
+
 // parts.c
 extern struct parts_list parts_list;
 struct parts *parts_try_get(int parts_no);
@@ -244,7 +249,7 @@ bool parts_set_number(struct parts *parts, int n, int state);
 void parts_set_state(struct parts *parts, enum parts_state_type state);
 void parts_release(int parts_no);
 void parts_release_all(void);
-void parts_set_surface_area(struct parts_common *common, int x, int y, int w, int h);
+void parts_set_surface_area(struct parts *parts, struct parts_common *common, int x, int y, int w, int h);
 
 // render.c
 void parts_render_init(void);
diff --git a/src/parts/render.c b/src/parts/render.c
index b3edbca..a44321a 100644
--- a/src/parts/render.c
+++ b/src/parts/render.c
@@ -81,17 +81,16 @@ static void parts_render_cg(struct parts *parts, struct parts_common *common,
 	}
 
 	gfx_prepare_job(&job);
-	glUniform1f(parts_shader.alpha_mod, common->texture.alpha_mod / 255.0);
+	glUniform1f(parts_shader.alpha_mod, params->alpha / 255.0);
 	glUniform2f(parts_shader.bot_left, r.x, r.y);
 	glUniform2f(parts_shader.top_right, r.x + r.w, r.y + r.h);
 	gfx_run_job(&job);
 }
 
-static void _parts_render(struct parts *parts, struct parts_render_params *parent_params)
+void parts_render(struct parts *parts)
 {
 	if (!parts->show)
 		return;
-
 	if (parts->linked_to >= 0) {
 		struct parts *link_parts = parts_get(parts->linked_to);
 		struct parts_state *link_state = &link_parts->states[link_parts->state];
@@ -99,11 +98,21 @@ static void _parts_render(struct parts *parts, struct parts_render_params *paren
 			return;
 	}
 
-	struct parts_render_params params = *parent_params;
-	// modify params per parts values
-	params.alpha *= parts->alpha / 255.0;
-	params.offset.x += parts->pos.x;
-	params.offset.y += parts->pos.y;
+	struct parts_render_params params = {
+		.offset = parts->pos,
+		.alpha = parts->alpha,
+	};
+
+	// adjust pos/alpha per parent parts
+	struct parts *parent = parts;
+	while (parent->parent >= 0) {
+		parent = parts_get(parent->parent);
+		if (!parent->show)
+			return;
+		params.alpha *= parent->alpha / 255.0f;
+		params.offset.x += parent->pos.x;
+		params.offset.y += parent->pos.y;
+	}
 
 	// render
 	struct parts_state *state = &parts->states[parts->state];
@@ -124,32 +133,13 @@ static void _parts_render(struct parts *parts, struct parts_render_params *paren
 			break;
 		}
 	}
-
-	// render children
-	struct parts *child;
-	TAILQ_FOREACH(child, &parts->children, parts_list_entry) {
-		_parts_render(child, &params);
-	}
-}
-
-void parts_render(struct parts *parts)
-{
-	struct parts_render_params params = {
-		.offset = { 0, 0 },
-		.alpha = 255,
-	};
-	_parts_render(parts, &params);
 }
 
 void parts_engine_render(possibly_unused struct sprite *_)
 {
-	struct parts_render_params params = {
-		.offset = { 0, 0 },
-		.alpha = 255,
-	};
 	struct parts *parts;
-	TAILQ_FOREACH(parts, &parts_list, parts_list_entry) {
-		_parts_render(parts, &params);
+	PARTS_LIST_FOREACH(parts) {
+		parts_render(parts);
 	}
 }
 
diff --git a/src/parts/text.c b/src/parts/text.c
index db775dc..0ef6404 100644
--- a/src/parts/text.c
+++ b/src/parts/text.c
@@ -114,8 +114,9 @@ bool PE_SetPartsTextSurfaceArea(int parts_no, int x, int y, int w, int h, int st
 	if (!parts_state_valid(--state))
 		return false;
 
-	struct parts_text *text = parts_get_text(parts_get(parts_no), state);
-	parts_set_surface_area(&text->common, x, y, w, h);
+	struct parts *parts = parts_get(parts_no);
+	struct parts_text *text = parts_get_text(parts, state);
+	parts_set_surface_area(parts, &text->common, x, y, w, h);
 	return true;
 }