"Mark James Lewin" wrote:
> Thanks Rune. I thought of using wood or onion, but the good
> thing about spiral is that in addition to giving the nice radial
> pattern on the face of the metal cylinder, it _also_ gives fine
> grooves along the length of the metal cylinder.

Yes, that's an advantage. With my method you have to use different textures
for the "faces" and the "lengths".

> Could you please give a quick example of the averaging of
> normals method? I don't quite follow.

I had forgot some details about my method - it's a bit more complicated. You
average whole textures instead.

The attached image was rendered without AA at all, and it took 25 seconds to
render. The effect is a bit different than yours, but it might work for you
with some modifications.

If you're still interested, I can post the code of you like.

Greetings,

Rune
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