>> function{pigment_foo(x,y,z).red+pigment_foo(x,y,z).green/256}
>> 
>> which is probably where you are almost at anyway.
> 
> Note this is probably an extremely bad idea since it does not work with
> interpolation and using not interpolated image maps will result in
> infinite gradients in the function.
> 
Well, I thought that I will run into trouble with bilinear 
interpolation. However, I actually didn't see any problems. 

I'm interpolating the LSB and the MSB pigment map separately 
and it looks great. Not interpolating one of them is a bad idea. 

Maybe we could find a mathematical proof for the correctness or 
falseness...

Wolfgang

Post a reply to this message