Mossy Stone Wall - Another model created in Google SketchUp and exported to Trainz with RubyTMIX. The effective system load of this asset is 2456 polygons. This is an oversized item intended for use with garden railway routes. The original model was found on 3dwarehouse.sketchup.com and brought into Trainz using the RubyTMIX tool after some basic modifications (enlargement mostly) but otherwise unchanged. Original model 3D stone brick wall by Denes H..