AllowAmbientOcclusion (Property)

Ouch! The following article, AllowAmbientOcclusion (Property), mentions a feature exclusive to certain versions of the client. Specifically: Not in production clients.

AllowAmbientOcclusion
Type	bool
Description	Whether or not ambient occlusion will be used when rendering shadows. Ambient occlusion is a shading method used in 3D computer graphics which helps add realism to local reflection models by taking into account the loss of intensity of light through hidden surfaces.
Member of	RenderSettings