@Tottel - thanks, but unfortunately it's already enabled.
@Esenthel - is there a way to create object type that works as decals, but support those maps? Also, what is the difference between decals and mesh overlay then?
I have not used overlays or decals personally but ScarletThread did and made a video about it. (linked below). I feel like i learned a lot from it with regards to Decals and Overlays. If you skip to the end of the video, you will see where he switches from a decal to an overlay.