Tried that just now. The result looks like the image with no bump mapping which really doesn't make a hell of a lot os sense to me.

Further investigation... Reconfirmed that it does happen with GI turned off. For a second there I thought I'd be making a fool of myself.

Decided to try a different shader instead of brick. Veloute tools' 2D gradient worked rather well. Although I was looking for a slightly more understated effect than the one it gave me. I couldn't make the transition 'fine' enough.

I tried Anything Grooves on the beast but it made a hash of the mesh. Also, to get the understated look that I'm gunning for, the UV sampling would really need to be cranked up and that would make a huge mesh or a long time to calculate. Anyway, the generated mesh was unusable so the point is moot.

Ended up going with the following formula

a = u * 2;
a = a * 13;
a = mod(a, 1);
b = ((0.01 < a && a < 0.99) ? 1 : 0.5);
value = b;

And found out that formulae also don't behave as you'd expect in the bump channel. Not as hideous as the brick but not really close to what I expected from seeing the same formula shader in the color channel. Sigh, looks like I'll just leave it part of the color channel and hope that it'll be enough. If not then I'll compromise and use the veloute 2D gradient.

Thanks

Message edited on: 04/15/2005 00:43