I'm using Marmoset 3.05. When I bake out a Vertex Color map as a PNG it includes alpha in the empty UV space. Is it supposed to? I swear it didn't used to include alpha.
Vertex alpha support was added with 3.05, so you should be seeing the vertex alpha content in the PNG's alpha channel.
If this is problematic, you can remove the alpha channel in Photoshop by going to Layer-> Layer Mask -> From Transparency. This will split out the alpha channel into a layer mask which you can delete.
Alternatively you can use PSD and simply delete the alpha channel.
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If this is problematic, you can remove the alpha channel in Photoshop by going to Layer-> Layer Mask -> From Transparency. This will split out the alpha channel into a layer mask which you can delete.
Alternatively you can use PSD and simply delete the alpha channel.