Some background on the issue that I'm looking for a workaround to:

From: https://www.povray.org/documentation/view/3.60/356/
"A patterned texture cannot be used as a layer in a layered texture"

I'm wondering why.

So, what are "patterned textures?
https://www.povray.org/documentation/view/3.6.1/352/

"Patterned textures are complex textures made up of multiple textures. The
component textures may be plain textures or may be made up of patterned
textures. A plain texture has just one pigment, normal and finish statement.
Even a pigment with a pigment map is still one pigment and thus considered a
plain texture as are normals with normal map statements."

What I'm aiming to accomplish:
I have several uv_mapped bicubic_patch objects that obviously have their own
individual textures.
What I'm trying to do is apply a single normal to all the patches that is not
controlled by the patch <u, v> vectors, but the global <x, y, z> vectors of
POV-space.

So although the pigment/texture coloring may differ on each patch, the normal
needs to be continuous, rather than cycling over <0, 0> to <1, 1> at the edge of
every patch.

Any examples / ideas?

- BE

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