Procedural Texture Saturation Mask (Part 5): Creating a Preset

Summary

A variable saturation mask can be a very useful tool. Here we take the fifth step in building one with the Procedural Texture filter. Note that we will be going very slowly with this, explaining the detail of how to create a preset in Procedural Texture.

In this step we add a switch to flip between the 'visualise' view (ie. black and white) and 'mask', which can be used in the way of any normal mask. A quick demo is then done.

The formulae to use are:

R:
(d*(1-((max(R,G,B)-min(R,G,B))*(a+1)*(b+1)+c))+(1-d)*(((max(R,G,B)-min(R,G,B))*(a+1)*(b+1)+c)))*(1-e)+e*R

G:
(d*(1-((max(R,G,B)-min(R,G,B))*(a+1)*(b+1)+c))+(1-d)*(((max(R,G,B)-min(R,G,B))*(a+1)*(b+1)+c)))*(1-e)+e*G

B:
(d*(1-((max(R,G,B)-min(R,G,B))*(a+1)*(b+1)+c))+(1-d)*(((max(R,G,B)-min(R,G,B))*(a+1)*(b+1)+c)))*(1-e)+e*B

A:
(d*(1-((max(R,G,B)-min(R,G,B))*(a+1)*(b+1)+c))+(1-d)*(((max(R,G,B)-min(R,G,B))*(a+1)*(b+1)+c)))*e+(1-e)*A

For this to work, you need the following sliders and controls below (all initially defaulting to zero):

-1,1: a: Stretch/Squeeze

Z: b: Stretch Boost

-1,1: c: Shift

Z: d: Invert (0=Sat, 1=Desat)

Z: e: 0=Preview, 1=Mask

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Procedural Texture Saturation Mask (Part 5): Creating a Preset

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