Can't seem to figure out how to enable error coloring. Anyone know how?

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If you can’t make two uv sets in Silo, you can let the UE4 handle it for you. Best thing for you might be to reuse the UVs from Channel 0 this way it just rearranges the UVs without distorting them.

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why I don’t have this menu? in version 4.5.0 I don’t understand can there somehow differently all this becomes?

http://s019.radikal.ru/i617/1410/4f/c79e05c30e27.jpg