I have a fairly large terrain with satellite imagery over it, G. Earth style (via world compositor for Unity engine), but I would like to paint over it, not to just delete the satellite imagery, but to keep it temporarily, so that I know where the houses and stuff should be, so basically I want a multilayer material/texture or something, with one layer being the imagery and the second layer being my painting, is that possible?
Also, how should I go best with increasing the resolution of the painting textures? Since it’s a satellite imagery, when viewed from a human height, the ground is all blurry, it’s only good if you look at it from the air, but I want to create something like a game level. Should I cut the terrain itself in a bunch of small sections and create a separate 2048 texture for each of them? Currently I just have one huge 8192xsomething texture.
Note that I never really touched the paint section of Blender, I only dealt with materials and uv textures, so dumb it down a little.
This is how it looks as of now, the area covered is something like 1.6x1.6km (or mile x mile)