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Can Vertex Colors Contribute to Lightmaps?


I have hand-painted vertex colours on a mesh and the result looks similar to lava (lots of oranges and reds). I have then set a material that uses a 'Vertex Color' node plugged straight into 'Emissive Color' with a multiplier to boost its intensity.

When I calculate lightmaps, it does contribute to the rest of the scene but the lighting it generates is just white, without the lovely oranges and reds that I painted. I'm wondering, is it possible to make them contribute to the lighting solution somehow?

I would ideally like to avoid externally baking to textures as manually painting the vertices and just working with those would be a big win in terms of speed. Any help would be greatly appreciated!

Thanks, John

Product Version: UE 4.18 Preview
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asked Oct 06 '17 at 11:38 PM in Using UE4

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John Kearney
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Generally, certain things in material will have no effect on lightmap baking. If i'm not mistaken, vertex color is one of them.

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answered Oct 07 '17 at 06:53 PM

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