Just found this

http://myinventions.pl/index.php?page=Blender3DscannerConcept

is there any way you can do this in the game engine, without the camera??

Image “Ground map”+ “falloff brush” =real time crater…

just manipulate a displacement map in real time??

I don’t know enough about it to help, but this project looks like it has the “bones” for it already

Subdivide a plane a number of times. UV map a mid-grey image to it.
Use GLSL to do real-time texture painting.
Write a script that reads each vertices colour, and alter’s it’s height based on it.

like Map displacement = Map displacement +Brush?

so Current.png =displacement.png+falloff brush, offset 10,20

this could edit ANY map if was built it in, to the trunk…?