GKDantas,

My deformer does build up an internal texture map which a linked shader can use to get a depth value.  I didnt perfect this feature though and it didnt work for large terrains.  

Most games use decals for bullet holes and footprints.  The idea of using the collision of objects with a terrain to paint a detailed bump map is interesting.  That sounds more like the kind of thing Eric at the DCG could do. 

(For your other off-topic idea send me any requests directly and I'll see what I can do.  Modifiers are my speciality though.)