diff --git a/source/glest_game/game/game.cpp b/source/glest_game/game/game.cpp
index 70a1a688..05b95156 100644
--- a/source/glest_game/game/game.cpp
+++ b/source/glest_game/game/game.cpp
@@ -1683,6 +1683,7 @@ void Game::render2d(){
 		str+= "Render FPS: "     + intToStr(lastRenderFps) + "[" + intToStr(avgRenderFps) + "]\n";
 		str+= "Update FPS: "     + intToStr(lastUpdateFps) + "[" + intToStr(avgUpdateFps) + "]\n";
 		str+= "GameCamera pos: " + floatToStr(gameCamera.getPos().x)+","+floatToStr(gameCamera.getPos().y)+","+floatToStr(gameCamera.getPos().z)+"\n";
+		str+= "Cached surfacedata: " +  intToStr(renderer.getCachedSurfaceDataSize());
 		str+= "Time: "           + floatToStr(world.getTimeFlow()->getTime(),2)+"\n";
 		if(SystemFlags::getThreadedLoggerRunning() == true) {
             str+= "Log buffer count: "  + intToStr(SystemFlags::getLogEntryBufferCount())+"\n";
diff --git a/source/glest_game/graphics/renderer.cpp b/source/glest_game/graphics/renderer.cpp
index fef4eff5..b86ba246 100644
--- a/source/glest_game/graphics/renderer.cpp
+++ b/source/glest_game/graphics/renderer.cpp
@@ -154,6 +154,7 @@ Renderer::Renderer() {
 	textRenderer = NULL;
 	particleRenderer = NULL;
 	saveScreenShotThread = NULL;
+	mapSurfaceData.clear();
 
 	lastRenderFps=MIN_FPS_NORMAL_RENDERING;
 	shadowsOffDueToMinRender=false;
@@ -231,6 +232,7 @@ Renderer::~Renderer() {
 		}
 	}
 
+	mapSurfaceData.clear();
 	this->menu = NULL;
 	this->game = NULL;
 }
@@ -310,6 +312,7 @@ void Renderer::initGame(const Game *game){
 	SystemFlags::OutputDebug(SystemFlags::debugSystem,"In [%s::%s Line: %d]\n",__FILE__,__FUNCTION__,__LINE__);
 
 	SurfaceData::nextUniqueId = 1;
+	mapSurfaceData.clear();
 	this->game= game;
 	worldToScreenPosCache.clear();
 
@@ -430,6 +433,8 @@ void Renderer::end() {
 
 	//delete 2d list
 	glDeleteLists(list2d, 1);
+
+	mapSurfaceData.clear();
 }
 
 void Renderer::endGame() {
@@ -449,6 +454,7 @@ void Renderer::endGame() {
 
 	worldToScreenPosCache.clear();
 	ReleaseSurfaceVBOs();
+	mapSurfaceData.clear();
 }
 
 void Renderer::endMenu() {
diff --git a/source/glest_game/graphics/renderer.h b/source/glest_game/graphics/renderer.h
index f212a18c..1bf7d2af 100644
--- a/source/glest_game/graphics/renderer.h
+++ b/source/glest_game/graphics/renderer.h
@@ -428,6 +428,7 @@ public:
 	void renderProgressBar(int size, int x, int y, Font2D *font,int customWidth=-1, string prefixLabel="");
 
 	static Texture2D * findFactionLogoTexture(string logoFilename);
+	int getCachedSurfaceDataSize() const { return mapSurfaceData.size(); }
 
 private:
 	//private misc