diff --git a/source/blender/makesrna/intern/rna_render.c b/source/blender/makesrna/intern/rna_render.c
index 28d309c2d37..d00507e8bcf 100644
--- a/source/blender/makesrna/intern/rna_render.c
+++ b/source/blender/makesrna/intern/rna_render.c
@@ -207,14 +207,12 @@ static int rna_RenderPass_rect_get_length(PointerRNA *ptr, int length[RNA_MAX_AR
 static void rna_RenderPass_rect_get(PointerRNA *ptr, float *values)
 {
 	RenderPass *rpass= (RenderPass*)ptr->data;
-	printf("rect get\n");
 	memcpy(values, rpass->rect, sizeof(float)*rpass->rectx*rpass->recty*rpass->channels);
 }
 
 static void rna_RenderPass_rect_set(PointerRNA *ptr, const float *values)
 {
 	RenderPass *rpass= (RenderPass*)ptr->data;
-	printf("rect set\n");
 	memcpy(rpass->rect, values, sizeof(float)*rpass->rectx*rpass->recty*rpass->channels);
 }
 
@@ -283,6 +281,10 @@ static void rna_def_render_engine(BlenderRNA *brna)
 	RNA_def_property_boolean_sdna(prop, NULL, "type->flag", RE_DO_PREVIEW);
 	RNA_def_property_flag(prop, PROP_REGISTER_OPTIONAL);
 
+	prop= RNA_def_property(srna, "bl_postprocess", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_negative_sdna(prop, NULL, "type->flag", RE_DO_ALL);
+	RNA_def_property_flag(prop, PROP_REGISTER_OPTIONAL);
+
 	RNA_define_verify_sdna(1);
 }
 
diff --git a/source/blender/render/extern/include/RE_pipeline.h b/source/blender/render/extern/include/RE_pipeline.h
index 9373b3e20c9..c0d1d251356 100644
--- a/source/blender/render/extern/include/RE_pipeline.h
+++ b/source/blender/render/extern/include/RE_pipeline.h
@@ -253,9 +253,10 @@ struct Scene *RE_GetScene(struct Render *re);
 
 /* External Engine */
 
-#define RE_INTERNAL		1
-#define RE_GAME			2
-#define RE_DO_PREVIEW	4
+#define RE_INTERNAL			1
+#define RE_GAME				2
+#define RE_DO_PREVIEW		4
+#define RE_DO_ALL			8
 
 extern ListBase R_engines;
 
diff --git a/source/blender/render/intern/source/pipeline.c b/source/blender/render/intern/source/pipeline.c
index f2b58c5dc0f..2d7b724d893 100644
--- a/source/blender/render/intern/source/pipeline.c
+++ b/source/blender/render/intern/source/pipeline.c
@@ -1736,12 +1736,12 @@ void RE_TileProcessor(Render *re)
 
 /* ************  This part uses API, for rendering Blender scenes ********** */
 
-static int external_render_3d(Render *re);
+static int external_render_3d(Render *re, int do_all);
 
 static void do_render_3d(Render *re)
 {
 	/* try external */
-	if(external_render_3d(re))
+	if(external_render_3d(re, 0))
 		return;
 
 	/* internal */
@@ -2479,8 +2479,11 @@ static void do_render_all_options(Render *re)
 
 	/* ensure no images are in memory from previous animated sequences */
 	BKE_image_all_free_anim_ibufs(re->r.cfra);
-	
-	if((re->r.scemode & R_DOSEQ) && re->scene->ed && re->scene->ed->seqbase.first) {
+
+	if(external_render_3d(re, 1)) {
+		/* in this case external render overrides all */
+	}
+	else if((re->r.scemode & R_DOSEQ) && re->scene->ed && re->scene->ed->seqbase.first) {
 		/* note: do_render_seq() frees rect32 when sequencer returns float images */
 		if(!re->test_break(re->tbh)) 
 			do_render_seq(re);
@@ -3132,7 +3135,7 @@ void RE_result_load_from_file(RenderResult *result, ReportList *reports, char *f
 	}
 }
 
-static int external_render_3d(Render *re)
+static int external_render_3d(Render *re, int do_all)
 {
 	RenderEngineType *type;
 	RenderEngine engine;
@@ -3145,6 +3148,10 @@ static int external_render_3d(Render *re)
 		return 0;
 	if((re->r.scemode & R_PREVIEWBUTS) && !(type->flag & RE_DO_PREVIEW))
 		return 0;
+	if(do_all && !(type->flag & RE_DO_ALL))
+		return 0;
+	if(!do_all && (type->flag & RE_DO_ALL))
+		return 0;
 
 	BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
 	if(re->result==NULL || !(re->r.scemode & R_PREVIEWBUTS)) {