This tool allows to copy vertex colors between meshes, you can choose which channels you want to copy.

Only the selected channels will be copied, other channels will not be overwritten.

Tutorial: https://youtu.be/SHAU8MithY4

Use case: you have a mesh with RGB vertex color, you bake something in Alpha (which also deletes the RGB), you copy RGB back using the tool.

Important: Both meshes must have exactly the same number of vertex colors!

To start the plugin go to "Engine/Plugins/IGToolsCVC Content" folder (in Content Browser), right click on "UI_CopyVertexColors" and select "Run Editor Utility Widget"