I am making very large scale terrain. I'm taking a height map image and converting it to terrain in 3DS Max, exporting it as .OBJ, importing it into MED and saving as MDL. Im creating the skin in MED and the terrain is a large enough model that if i use smaller than 4096x4096, the texture is then smaller than the model and so gets stretched out to cover the entire model. This results in the texture looking stretched and/or blurry at runtime.

On the other hand, you can have more than one skin on a model. I just dont know how to divide the skin mapping polys up and assign them to a given skin. Maybe i only need several 2048x2048 skins for one model instead of one big 4096x4096 skin?