On Wed, 13 Jun 2001 09:19:52 -0700, klaus rubba wrote:
>I have a simple glass disk (cylinder) lying on a white surface, and rather
>than appearing clear, there's a bunch of black 'noise' appearing under the
>disc. Seems like a max_trace_level problem, but I cranked that up into the
>hundreds with no success. If I move the disc up the tiniest fraction so it
>hovers above the surface, it appears fine, seems like some surface
>interaction or something. Any  ideas? Running on Win2K, 650MHz, 392M RAM,
>POV-Ray Version 3.1g.watcom.win32. Here's the scene code, any ideas? Is this
>a bug?

See http://www.students.tut.fi/~warp/povVFAQ/languageVFAQ.html#blackspots

-- 
#local R=rgb 99;#local P=R-R;#local F=pigment{gradient x}box{0,1pigment{gradient
y pigment_map{[.5F pigment_map{[.3R][.3F color_map{[.15red 99][.15P]}rotate z*45
translate x]}]#local H=pigment{gradient y color_map{[.5P][.5R]}scale 1/3}[.5F
pigment_map{[.3R][.3H][.7H][.7R]}]}}}camera{location.5-3*z}//only my opinions

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