I think I've discovered a bug in POV-Ray 3.1g. When the camera looks through
three or more "panes" of transparent material, the panes farthest away will
be coloured in completely black. It's hard to describe, so here is a simple
scene that causes the problem. In case it's relevant, my processor is an AMD
900 and I am running Windows 98.

//////////////////////////////////////////////
background {rgb <1,1,1>}

#declare Transparent =
pigment {rgbt <1,1,1,0.9>}

#declare Sheet =
box {<-1,-1,-0.05>,<1,1,0.05> pigment {Transparent}}


object {Sheet}
object {Sheet translate z*2}
object {Sheet translate z*4}

camera {location <2.1,0,-7> look_at <0,0,5>}
light_source {<10,10,-10> color 1}
////////////////////////////////////////////

Has anyone encountered this problem before? Is there a workaround?

Thanks in advance,
Bryan Spitz

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