Another classic impossible object that I could not resist trying to render.Technical Details and Credits
This image has been rendered using the POVRay raytracer. No post-processing has taken place on the image to make the illusion work; this is the 3D scene as it is rendered by the raytracer.
The grass texture is based on one provided by Rune S. Johansen [link]
This image has been updated in response to useful comments from folks at the povray.binaries.images newsgroup [link]
An older version of this scene can be found here [link]