William F Pokorny <ano### [at] anonymousorg> wrote:
> Back in 3.7 Warp added warp{cubic} for patterns. Helpful in that df3
> density_file patterns so warped can be much flatter (smaller in size)
> and still result in deeper shapes/medias. Similar to other built in
> warps, one needs to offset in +z - after x, y and z normalization(1) -
> by the half width you want for the box centered on the origin.
>
> Yep, the isosurface max_gradient for the attached image should have been
> set higher.
>
> Bill P.
>
> (1) - As with 2d images and image maps, 3d df3s - no matter their input
> dimensions - always fill the unit cube. Before warping one must do a
> normalization scale to get the thinner, as intended, 'shape' which is
> then offset in +z for size ahead of the warp{cubic}.

I guess that your description and the posted result are a bit too brief for me
to fill in the blanks.
The docs suggest that the pattern ought to be in the cruciform shape as depicted
here:
http://wiki.povray.org/content/File:RefImgBoxmap.gif

Is that closely related to what you're doing?

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