Am 08.05.2016 um 08:04 schrieb LanuHum:
> Problem.
> If I use custom brick_size I have the incorrect image.
...
> #declare Material = texture{
>     pigment{color srgbft <0.8000,0.8000,0.8000,0.0000,0.0000>}
>     normal{ brick 0.9000
>         brick_size <0.2500,0.0525,0.1250> mortar 0.0100

To compute normal perturbations for most patterns, POV-Ray samples the
pattern at 4 points in the vicinity of the surface point.

Obviously, the distance between those 4 sample points is not infinitely
small; as a matter of fact, it is in the order of magnitude of 0.02. As
you will notice, your brick_size parameters are close to that value.

To get the desired effect, it is sufficient to increase the brick_size
and mortar values, and instead make use of "scale" to get the desired size.

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