Color-picker doesn't behave consistent across OCIO configs.

(Using Substance-Painter version 7.4 - Windows)

Hello,

Since the latest big release 7.4 that introduce OCIO, it seems that the color-picker "picking" function doesn't work as excepted when using OCIO as a color-management system. The result vary depending of the OCIO config being used. Unfortunately there is no OCIO config that make it work in all the cases :

Here are my hypothesis :

Case 1

You are using an OCIO v2 config that uses Display colorspaces and Shared Views (OCIO v2 new features) :

The picker take the value at the display (after the view-transform is applied) and return it. This only work when there is no view-transform, i.e. is it is disabled or use a display with a "passtrough/raw" encoding. If you are viewing color data with the proper view-transform, the picked value will not correspond to the original value you used.

Case 2

You are using an OCIO v1 config or v2 without the new features : The picker take the value at display (with the view-transform), then apply an inverse display transform. It pick the default one, i.e. the first defined in the config or in the active_displays key. And as the sliders don't go above 1, the result is clamped between the 0-1 range.

To come to these conclusions, I executed a bunch of tests with various OCIO configs.

You can find them here: https://liamcollod.notion.site/Substance-Painter-Color-Picker-Issue-1d1cdeeb0e2846ba977ebc453e5ae56b 

I don't really know what is the actually issue but I can tell for sure that there is unfortunately very few cases where the colorpicker pick the original value properly.

Hope you could have a look at that.

Cheers.

Liam.