I have a light source in a hollow cylinder which throws a circle on a sheet
placed above it. The cylinder prevents light to fall directly on the Y plane.
The sheet is reflective, so I would expect reflected light on the plane around
the light source. But the plane remains dark. Any idea how to fix it? I'm trying
to emulate a white fabric with the sheet: partly reflective and partly
transparent.

..pov file and rendered image can be found on http://nenya1.net/temp/20111021/

TIA
Steven

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