1 files changed, 10 insertions, 7 deletions
diff --git a/release/scripts/ui/properties_world.py b/release/scripts/ui/properties_world.py
index fe1c085dc02..5179fc5f0d2 100644
--- a/release/scripts/ui/properties_world.py
+++ b/release/scripts/ui/properties_world.py
@@ -29,15 +29,16 @@ class WorldButtonsPanel():
     bl_context = "world"
     # COMPAT_ENGINES must be defined in each subclass, external engines can add themselves here
 
-    def poll(self, context):
-        rd = context.scene.render
-        return (context.world) and (not rd.use_game_engine) and (rd.engine in self.COMPAT_ENGINES)
-
 
 class WORLD_PT_preview(WorldButtonsPanel, bpy.types.Panel):
     bl_label = "Preview"
     COMPAT_ENGINES = {'BLENDER_RENDER'}
 
+    @staticmethod
+    def poll(context):
+        rd = context.scene.render
+        return (context.world) and (not rd.use_game_engine) and (rd.engine in __class__.COMPAT_ENGINES)
+
     def draw(self, context):
         self.layout.template_preview(context.world)
 
@@ -47,9 +48,10 @@ class WORLD_PT_context_world(WorldButtonsPanel, bpy.types.Panel):
     bl_show_header = False
     COMPAT_ENGINES = {'BLENDER_RENDER'}
 
-    def poll(self, context):
+    @staticmethod
+    def poll(context):
         rd = context.scene.render
-        return (not rd.use_game_engine) and (rd.engine in self.COMPAT_ENGINES)
+        return (not rd.use_game_engine) and (rd.engine in __class__.COMPAT_ENGINES)
 
     def draw(self, context):
         layout = self.layout
@@ -205,7 +207,8 @@ class WORLD_PT_indirect_lighting(WorldButtonsPanel, bpy.types.Panel):
     bl_label = "Indirect Lighting"
     COMPAT_ENGINES = {'BLENDER_RENDER'}
 
-    def poll(self, context):
+    @staticmethod
+    def poll(context):
         light = context.world.lighting
         return light.gather_method == 'APPROXIMATE'