"Bald Eagle" <cre### [at] netscapenet> wrote:

> Maybe the best sslt test-bed would be a back-lit wedge of material, much like
> what Ansel Adams would do with the Zone System when calibrating negatives and
> prints.

This is a thin prism (0 to 0.1) with a single point light behind the left edge.

I'm wondering if eval_pigment could act as a way to guide the result?

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