"HFrik" <fri### [at] zonnetnl> wrote in message news:3e58a681@news.povray.org...

> In this part of a text file there is a yellow line in:
>
> function {(x*x+y*y+z*z-1) + noise3d(x,y,z)},
>
> the noise3d seems not to be working.
>
> Maybe you know the answer.

Hi there, yes, wrong syntax. It's f_noise3d(x,y,z), and hopefully you are
using a #include "functions.inc" before the isosurface. I think you might be
trying to do it the way MegaPOV had done it before version 3.5 of POV-Ray.

Bob

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