diff --git a/source/blender/python/api2_2x/sceneRender.c b/source/blender/python/api2_2x/sceneRender.c
index cc3497ffc79..8387b2a8d08 100644
--- a/source/blender/python/api2_2x/sceneRender.c
+++ b/source/blender/python/api2_2x/sceneRender.c
@@ -658,7 +658,7 @@ PyObject *RenderData_PartsX( BPy_RenderData * self, PyObject * args )
 {
 	return M_Render_GetSetAttributeShort( args,
 					      &self->renderContext->xparts, 1,
-					      64 );
+					      512 );
 }
 
 PyObject *RenderData_PartsY( BPy_RenderData * self, PyObject * args )
@@ -1566,14 +1566,14 @@ static int RenderData_setIValueAttrClamp( BPy_RenderData *self, PyObject *value,
 
 	switch( (int)type ) {
 	case EXPP_RENDER_ATTR_XPARTS:
-		min = 2;
+		min = 1;
 		max = 512;
 		size = 'h';
 		param = &self->renderContext->xparts;
 		break;
 	case EXPP_RENDER_ATTR_YPARTS:
-		min = 2;
-		max = 512;
+		min = 1;
+		max = 64;
 		size = 'h';
 		param = &self->renderContext->yparts;
 		break;
diff --git a/source/blender/src/buttons_scene.c b/source/blender/src/buttons_scene.c
index b557866b111..38d0ae88823 100644
--- a/source/blender/src/buttons_scene.c
+++ b/source/blender/src/buttons_scene.c
@@ -1250,8 +1250,8 @@ static void render_panel_render(void)
 	uiBlockEndAlign(block);
 
 	uiBlockBeginAlign(block);
-	uiDefButS(block, NUM,B_DIFF,"Xparts:",		369,46,95,29,&G.scene->r.xparts,2.0, 512.0, 0, 0, "Sets the number of horizontal parts to render image in (For panorama sets number of camera slices)");
-	uiDefButS(block, NUM,B_DIFF,"Yparts:",		465,46,95,29,&G.scene->r.yparts,2.0, 64.0, 0, 0, "Sets the number of vertical parts to render image in");
+	uiDefButS(block, NUM,B_DIFF,"Xparts:",		369,46,95,29,&G.scene->r.xparts,1.0, 512.0, 0, 0, "Sets the number of horizontal parts to render image in (For panorama sets number of camera slices)");
+	uiDefButS(block, NUM,B_DIFF,"Yparts:",		465,46,95,29,&G.scene->r.yparts,1.0, 64.0, 0, 0, "Sets the number of vertical parts to render image in");
 	uiBlockEndAlign(block);
 
 	uiBlockBeginAlign(block);