On 23.11.2016 22:50, Mike Horvath wrote:

> I have three functions that return values between 0 and 1 (inclusive).
> What is the proper threshold to use with them? Here is an example of one
> such function.

No threshold will give the desired result using the color
conversion function directly, as clipka explained you need
a define a "distance" function for this purpose.

Alternatively you could try to render the clipped function
(set to 0 outside the gamut) as strongly scattering media but
it may be fiddly and you don't get the look of a "surface"
regarding finish and lighting etc.

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