On Wed, 17 Oct 2001 18:42:19 +0300, Kari Kivisalo wrote:
>Trevor Quayle wrote:
>> 
>> Do you mean like this?
>
>Yes. Another key step towards realism :) I had plans to try
>this with multiple averaged bumps at different base frequencies
>but never got around calculating the required contributions
>and scale factors. 

Besides blurred transmission, there's another cool benefit to this method:
anisotropic blurring.

The first picture has no blurring.
The second picture has isotropic blurring.
The third picture has anisotropic blurring; the bumps are much taller than 
they are wide.  In a way, the cylinder has lots of vertical microscratches.

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