[Radiance-general] clouds textures

[bob coyne]

What's the best way to get a sky with a cloud texture map in Radiance 
(assuming
the cloud texture map is already "sphericized")?  I've tried applying a 
COLORPICT pattern onto
the sky SOURCE  but it doesn't work (I get black).  I assume this is 
because the UV
coordinates aren't available in the same way (with Lu, Lv) that works 
with mesh objects.

I've also tried making a polygonal mesh sky dome. That's easily textured 
but creates other problems
(shadows and other lighting effects on the sky) .

Thanks for any help or guidance on how to do this sort of thing! 


- Bob