On 16-4-2012 12:56, D103 wrote:
> Ok, problems. :(
>
> To generate a unique cloud map for each planet, I need to (among other things)
> load the image map and normal map.
>
>  From these, I need to take samples along the x and y axis, and I don't know how
> to do so. My first thought was the trace() function, but I don't know whether I
> can get trace() to return the colour of the intersection.
>
> Second problem, even if I can use trace(), this means that I have to have the
> colour_maps in the scene in some form or another, and as the cloud_map is
> partially transparent, this would mean that the other objects would appear in
> the final render. :(
>
> Perhaps I could get around this by using two scene files? Downside would be less
> convenience, but if it's the only way...
>
> Regards
> D103
>
>
If I understand you correctly, I think you should use eval_pigment() 
instead of trace().

Thomas

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