(what exactly is a detail map, is it overlayed on your tiled mipmap?}
detail maps get used to add details like cracks which are visible when the camera is close (this avoids that the textures just look blurry when the camera is close). detail maps have a very fine resolution (high tiling) and get overlayed over the other textures. but it's difficult to create a good looking detail map...
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Is it possible to have a map as a lightmap to do shadows (not tiled)??
