[Radiance-general] Different colorpict modifiers for diffuse reflection/transmission (BRTDfunc)

[Jon Sargent]

Is there a way to use two different picture modifiers in a BRTDfunc, for
diffuse reflection and transmission respectively?  My first thought was to
make the distinction within colorpict (combining two pictures into a single
image, then using RdotP to decide which half of the image to sample).
Unfortunately, RdotP appears to be inaccessible from colorpict :(.  Maybe
there's another way to go about it?

Cheers,

Jon
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