It looks like demo mode is running out of time and returning black, so for this one where the shader is in the alpha channel all you end up getting is the green of the color channel.

The time constraint is actually the number of times the plug-in will evaluate a shader. On a complicated shader with lots of Enhance:C's that might burn up pretty quick. The Briar Patch stops working about halfway through a typical preview window, map gets through about 3 refreshes. Quick suggestion is to size your preview window smaller and I'll try to get one out in the next few days that gives a little more time.

Thanks,
Eric Winemiller
Digital Carvers Guild
Carrara plug-ins
http://digitalcarversguild.com

Eric Winemiller
Digital Carvers Guild
Carrara and LightWave plug-ins