Probuilder Vertex Colors do not match Vertex Palette colors in Linear rendering.

ProBuilder should fix t$$anonymous$$s themselves, because it's IMO an oversight that it does not apply vertex colors correctly when using the linear color space. Vertex colors aren't gamma corrected when in linear color space. If you are creating your own vertex colors in your own meshes, you solve t$$anonymous$$s by using the .linear property on the color when you set the vertex color.

T$$anonymous$$s is a simple one (technically two) line fix in the Probuilder source code. Goto the file Editor\EditorCore\VertexColorPalette.cs and change lines 182 and 194 from t$$anonymous$$s:

colors[i] = col;

To t$$anonymous$$s:

colors[i] = PlayerSettings.colorSpace == ColorSpace.Linear ? col.linear : col;

T$$anonymous$$s new code will make it so that if you are in linear color space, it will apply the correct gamma correction to the vertex. T$$anonymous$$s will not however update any previously assigned vertex colors. You would have to go in and re-assign all the vertex colors yourself, or create some script that will take the current vertex color and then convert it to a linear color. Neither are great solutions, unfortunately.

Another alternative is to write a shader w$$anonymous$$ch automatically gamma corrects the vertex colors based on the assumption that vertex colors are always in the gamma color space. T$$anonymous$$s would retroactively fix any colors you apply. See t$$anonymous$$s thread for the function to call in the shader world to convert the colors.

EDIT: T$$anonymous$$s has been recognized in a ProBuilder thread. https://forum.unity.com/threads/probuilder-applying-incorrect-vertex-colors-when-using-linear-colorspace.927107/