Am 23.08.2014 16:54, schrieb Jaime Vives Piqueres:
> El 23/08/14 a las #4, Thomas de Groot escribió:
>> It seems counter-intuitive to me, but inverting the bump_size seems
>> to give the correct result (see image). Somehow, this is the inverse
>> of what I /read/ or /understand/ from what is said in Poseray.
>
>    I remembered now that this happened to me once, and the problem was
> that the mesh was inverted... maybe that's the case?

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.

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.

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