okey what im looking for is a way to do the extra detail on objects mainly buildings, so at the moment i will so many different types of textures for buildings, all being plain with no real detail to them.
what i want to be able to do is add an image over the top but a lot smaller image and many of them in some cases, so if you imagine i have a plain building, and on the side i want some graffiti, at the bottom i want a bit of grass, on the other side i have some vines running up the side of the building with moss spreading over the wall.
so how do take small images of these and apply them to a building but not add any more textures or draw calls.
by the way at the moment i use lights for graffiti and some other things and then bake it, is there a method similar to this or do i have to create my own