1) 8192 res. Needed...of course
2) non-square texture in & out...this is the worst part about the whole suite. What an arbitrary limitation.
3) Don't down-res my textures!!! I brought in some 8192 scanned textures, started tiling, clean up, export......ahhh, blurry!!!
It didn't down-res to 4096 at the crop, but rather at the initial import. Thus even though the section I eventually wanted to crop out was smaller than 4096 it ended up being half the resolution since it was downsized on import....
