No, no, no need to scale up and down. If you want to use values between 0-1000 then simply divide by 1000 when setting the height of the terrain...
Fredborg
ModifyTerrain terrain,grid_x,grid_z,0.5 Is the same as ModifyTerrain terrain,grid_x,grid_z,500/1000.0Just remember to divide by 1000 every time...
Fredborg