"Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmailcom> wrote:
>
> I suspect that the reason that the "skew" disappears when using your
> "desperation" code is that there you are "sampling" the
> PIG_DISTORTION_FUNC at different locations in 3D space for each of
> the red, green and blue components (.x .y .z), This causes the 3
> components to have different values.

That is a very interesting and subtle point, and I think I grasp the idea. I can
sort of visualize this effect 'writ large' if I had used, say, the bozo pattern
for my 'distortion' function-- it has very distinct primary colors, and thus
three distinctly different grayscale values when made into a function. But in my
case I used the bumps pigment, which is grayscale to begin with...so all the
color channels are the same, as you mentioned-- and should(?) all be 'sampled'
in the same 3D space location.

[conjecture]
Or maybe your point is that even grayscale 'bumps' has dark-to-light
variations... and it is *those* variations that are sampled in different 3D
space?

Hmm, much food for thought. Thanks for the intriguing explanation.

(BTW: Using the bumps pigment, I scaled it *very* small to be almost like noise,
and its 'skew' still showed up and was even more obvious...until I fixed it of
course.)

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