diff --git a/code/redalert/cell.cpp b/code/redalert/cell.cpp
index b6560ae..dfbefac 100644
--- a/code/redalert/cell.cpp
+++ b/code/redalert/cell.cpp
@@ -84,10 +84,8 @@
 */
 #include "SidebarGlyphx.h"
 
-std::vector<const ObjectClass*> renderedFrameObjects;
-
 bool HasRenderedObject(const ObjectClass* technoClass) {
-	return std::find(renderedFrameObjects.begin(), renderedFrameObjects.end(), technoClass) != renderedFrameObjects.end();
+	return technoClass->lastRenderTime == g_startFrameTime;
 }
 
 /***********************************************************************************************
@@ -1445,7 +1443,7 @@ void CellClass::Draw_It(int x, int y, bool objects)
 				continue;
 			}
 
-			renderedFrameObjects.push_back(object);
+			object->lastRenderTime = g_startFrameTime;
 			int xx,yy;
 			if (object->IsToDisplay && (!object->Is_Techno() || ((TechnoClass *)object)->Visual_Character() == VISUAL_NORMAL) && Map.Coord_To_Pixel(object->Render_Coord(), xx, yy)) {				
 				{
diff --git a/code/redalert/object.h b/code/redalert/object.h
index 550b945..e9cc4b3 100644
--- a/code/redalert/object.h
+++ b/code/redalert/object.h
@@ -55,6 +55,8 @@ class TriggerClass;
 class ObjectClass : public AbstractClass
 {
 	public:
+		int lastRenderTime;
+
 		/*
 		**	The object can be in one of two states -- placed down on the map, or not. If the
 		**	object is placed down on the map, then this flag will be true.
diff --git a/code/redalert/winstub.cpp b/code/redalert/winstub.cpp
index 6a8923e..1a02980 100644
--- a/code/redalert/winstub.cpp
+++ b/code/redalert/winstub.cpp
@@ -81,8 +81,6 @@ SDL_GLContext game_context;
 int OverlappedVideoBlits = 0;
 float animFrameNum = 0;
 
-extern std::vector<const ObjectClass*> renderedFrameObjects;
-
 bool renderConsole = false;
 
 void (*Misc_Focus_Loss_Function)(void) = nullptr;
@@ -606,9 +604,7 @@ void ImGui_NewFrame(void) {
 	ImGui_ImplOpenGL3_NewFrame();
 	ImGui::NewFrame(show_oldframebuffer);
 
-	ImGui_ImplSDL2_NewFrame(game_window);
-
-	renderedFrameObjects.clear();
+	ImGui_ImplSDL2_NewFrame(game_window);	
 }
 
 void Device_Present(void) {