Index: binaries/data/config/default.cfg
===================================================================
--- binaries/data/config/default.cfg
+++ binaries/data/config/default.cfg
@@ -29,8 +29,9 @@
 ; Show detailed tooltips (Unit stats)
 showdetailedtooltips = false
 
-; Pause the game on window focus loss (Only applicable to single player mode)
-pauseonfocusloss = true
+; Pause game and rendering of the game on window focus loss (Pause only to single player game)
+; (0 - Disabled, 1 - Pause Game, 2 - Pause Game and Rendering, 3 - Pause Rendering)
+pauseonfocusloss = 1
 
 ; Persist settings after leaving the game setup screen
 persistmatchsettings = true
Index: binaries/data/mods/public/gui/options/options.json
===================================================================
--- binaries/data/mods/public/gui/options/options.json
+++ binaries/data/mods/public/gui/options/options.json
@@ -22,10 +22,17 @@
 				"config": "windowed"
 			},
 			{
-				"type": "boolean",
+				"type": "dropdown",
 				"label": "Background Pause",
-				"tooltip": "Pause single player games when window loses focus",
-				"config": "pauseonfocusloss"
+				"tooltip": "Pause game (only single player) or rendering of the game when window loses focus.",
+				"config": "pauseonfocusloss",
+				"function": "UpdatePauseOnFocusLoss",
+				"list": [
+					{ "value": 0, "label": "Disabled" },
+					{ "value": 1, "label": "Pause Game" },
+					{ "value": 2, "label": "Pause Game and Rendering" },
+					{ "value": 3, "label": "Pause Rendering" }
+				]
 			},
 			{
 				"type": "boolean",
Index: source/main.cpp
===================================================================
--- source/main.cpp
+++ source/main.cpp
@@ -305,13 +305,13 @@
 	ENSURE(realTimeSinceLastFrame > 0.0f);
 
 	// decide if update/render is necessary
-	bool need_render = !g_app_minimized;
+	bool need_render = !g_app_minimized && (!g_PauseRendererOnFocusLoss || g_app_has_focus);
 	bool need_update = true;
 
 	// If we are not running a multiplayer game, disable updates when the game is
 	// minimized or out of focus and relinquish the CPU a bit, in order to make
 	// debugging easier.
-	if (g_PauseOnFocusLoss && !g_NetClient && !g_app_has_focus)
+	if (g_PauseGameOnFocusLoss && !g_NetClient && !g_app_has_focus)
 	{
 		PROFILE3("non-focus delay");
 		need_update = false;
Index: source/ps/GameSetup/Config.h
===================================================================
--- source/ps/GameSetup/Config.h
+++ source/ps/GameSetup/Config.h
@@ -42,7 +42,10 @@
 //-----------------------------------------------------------------------------
 
 // flag to pause the game on window focus loss
-extern bool g_PauseOnFocusLoss;
+extern bool g_PauseGameOnFocusLoss;
+
+// flag to pause the renderer on window focus loss
+extern bool g_PauseRendererOnFocusLoss;
 
 // flag to switch on actor rendering
 extern bool g_RenderActors;
@@ -96,6 +99,8 @@
 extern CStrW g_CursorName;
 extern const wchar_t g_DefaultCursor[];
 
+extern void ConfigSetPauseOnFocusLoss();
+
 class CmdLineArgs;
 extern void CONFIG_Init(const CmdLineArgs& args);
 
Index: source/ps/GameSetup/Config.cpp
===================================================================
--- source/ps/GameSetup/Config.cpp
+++ source/ps/GameSetup/Config.cpp
@@ -35,7 +35,8 @@
 bool g_NoGLAutoMipmap = false;
 bool g_NoGLVBO = false;
 
-bool g_PauseOnFocusLoss = false;
+bool g_PauseGameOnFocusLoss = false;
+bool g_PauseRendererOnFocusLoss = false;
 
 bool g_RenderActors = true;
 
@@ -92,7 +93,9 @@
 	CFG_GET_VAL("nos3tc", g_NoGLS3TC);
 	CFG_GET_VAL("noautomipmap", g_NoGLAutoMipmap);
 	CFG_GET_VAL("novbo", g_NoGLVBO);
-	CFG_GET_VAL("pauseonfocusloss", g_PauseOnFocusLoss);
+
+	ConfigSetPauseOnFocusLoss();
+
 	CFG_GET_VAL("renderactors", g_RenderActors);
 	CFG_GET_VAL("shadows", g_Shadows);
 	CFG_GET_VAL("shadowpcf", g_ShadowPCF);
@@ -115,6 +118,25 @@
 	CFG_GET_VAL("gui.scale", g_GuiScale);
 }
 
+void ConfigSetPauseOnFocusLoss()
+{
+	int pauseOnFocusLoss = 0;
+	CFG_GET_VAL("pauseonfocusloss", pauseOnFocusLoss);
+	
+	g_PauseGameOnFocusLoss = false;
+	g_PauseRendererOnFocusLoss = false;
+
+	switch (pauseOnFocusLoss)
+	{
+	case 3:
+		g_PauseRendererOnFocusLoss = true;
+		break;
+	case 2:
+		g_PauseRendererOnFocusLoss = true;
+	case 1:
+		g_PauseGameOnFocusLoss = true;
+	}
+}
 
 static void ProcessCommandLineArgs(const CmdLineArgs& args)
 {
Index: source/ps/scripting/JSInterface_Main.h
===================================================================
--- source/ps/scripting/JSInterface_Main.h
+++ source/ps/scripting/JSInterface_Main.h
@@ -33,6 +33,7 @@
 	bool HotkeyIsPressed_(ScriptInterface::CxPrivate* pCxPrivate, const std::string& hotkeyName);
 	int GetFps(ScriptInterface::CxPrivate* pCxPrivate);
 	int GetTextWidth(ScriptInterface::CxPrivate* pCxPrivate, const std::string& fontName, const std::wstring& text);
+	void UpdatePauseOnFocusLoss(ScriptInterface::CxPrivate* pCxPrivate);
 
 	void RegisterScriptFunctions(const ScriptInterface& scriptInterface);
 }
Index: source/ps/scripting/JSInterface_Main.cpp
===================================================================
--- source/ps/scripting/JSInterface_Main.cpp
+++ source/ps/scripting/JSInterface_Main.cpp
@@ -26,6 +26,7 @@
 #include "ps/CStrIntern.h"
 #include "ps/GUID.h"
 #include "ps/GameSetup/Atlas.h"
+#include "ps/GameSetup/Config.h"
 #include "ps/Globals.h"
 #include "ps/Hotkey.h"
 #include "tools/atlas/GameInterface/GameLoop.h"
@@ -108,6 +109,11 @@
 	return width;
 }
 
+void JSI_Main::UpdatePauseOnFocusLoss(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
+{
+	ConfigSetPauseOnFocusLoss();
+}
+
 void JSI_Main::RegisterScriptFunctions(const ScriptInterface& scriptInterface)
 {
 	scriptInterface.RegisterFunction<void, &ExitProgram>("Exit");
@@ -121,4 +127,5 @@
 	scriptInterface.RegisterFunction<bool, std::string, &HotkeyIsPressed_>("HotkeyIsPressed");
 	scriptInterface.RegisterFunction<int, &GetFps>("GetFPS");
 	scriptInterface.RegisterFunction<int, std::string, std::wstring, &GetTextWidth>("GetTextWidth");
+	scriptInterface.RegisterFunction<void, &UpdatePauseOnFocusLoss>("UpdatePauseOnFocusLoss");
 }