clear texture cache instead of refreshing

src/pc/gfx/gfx_pc.c

@@ -571,6 +571,10 @@ static bool texname_to_texformat(const char *name, u8 *fmt, u8 *siz) {
 
 int preloaded_textures_count;
 
+void gfx_clear_texture_cache() {
+    memset(&gfx_texture_cache, 0, sizeof(gfx_texture_cache));
+}
+
 // calls import_texture() on every texture in the res folder
 // we can get the format and size from the texture files
 // and then cache them using gfx_texture_cache_lookup

src/pc/gfx/gfx_pc.h

@@ -31,6 +31,7 @@ void gfx_start_frame(void);
 void gfx_run(Gfx *commands);
 void gfx_end_frame(void);
 void gfx_precache_textures(void);
+void gfx_clear_texture_cache(void);
 void gfx_shutdown(void);
 
 extern int preloaded_textures_count;

src/saturn/imgui/saturn_imgui_expressions.cpp

@@ -51,7 +51,7 @@ void ShowExpressionContextMenu(Expression* expression, int id) {
                 if (expression->CurrentIndex > i || expression->CurrentIndex < i)
                     expression->CurrentIndex = 0;
             }
-            gfx_precache_textures();
+            gfx_clear_texture_cache();
             ImGui::CloseCurrentPopup();
         }
 

src/saturn/imgui/saturn_imgui_machinima.cpp

@@ -282,7 +282,7 @@ void parse_custom_level(char* data) {
             custom_level_face();
         }
     }
-    gfx_precache_textures();
+    gfx_clear_texture_cache();
     custom_level_finish();
 }