diff --git a/code/graphics/gropenglpostprocessing.cpp b/code/graphics/gropenglpostprocessing.cpp
index 3692dc246e..867bac4e9a 100644
--- a/code/graphics/gropenglpostprocessing.cpp
+++ b/code/graphics/gropenglpostprocessing.cpp
@@ -449,6 +449,8 @@ void gr_opengl_post_process_init() {
 	}
 
 	opengl::post_processing::create();
+
+	opengl::simple_effects::restore_defaults();
 
 	opengl::render_target::apply_default();
 }
diff --git a/code/parse/lua.cpp b/code/parse/lua.cpp
index 22f2900858..b2d84f159c 100644
--- a/code/parse/lua.cpp
+++ b/code/parse/lua.cpp
@@ -9958,6 +9958,10 @@ ADE_FUNC(loadMission, l_Mission, "Mission name", "Loads a mission", "boolean", "
 	if(!ade_get_args(L, "s", &s))
 		return ade_set_error(L, "b", false);
 
+	// clear post processing settings
+	if(!Is_standalone)
+		gr_screen.gf_set_default_post_process();
+
 	//NOW do the loading stuff
 	game_stop_time();
 	get_mission_info(s, &The_mission, false);