On 23-8-2014 18:44, clipka wrote:
> No, the true problem is that POV-Ray has been doing bump maps wrong for
> ages, and it's somewhat random whether a positive or negative bump_size
> gives you the desired results... or neither of them: There are cases
> where the bumps look like the light would be coming from 90 degrees off
> the true light direction.

Good to know. Somehow, I prefer this case otherwise I was beginning to 
doubt the wiring of my brain cells

>
> This isn't trivial to fix, and although it kind of has been the first
> item on my todo list ever, this probably requires some custom-tooled
> heavy duty mil-spec tuits.
>

Those are difficult to get at this moment...

Thomas

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