Mike Horvath <mik### [at] gmailcom> wrote:

> The problem seems to be the slope pattern. It does not work when used in
> this manner. Other patterns are okay.

Right, the slope pattern needs something to operate ON.  Otherwise what value
should the slope have?  The slope of WHAT?

http://news.povray.org/povray.advanced-users/thread/%3Cweb.5e9285d148d892ebfb0b41570%40news.povray.org%3E/


So, I think you're going to have to do it another way.
2 stage render?   1st using slope, then 2nd using that first render as an image
map?

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