Deformable Terrain

Anyone suggest this yet? Mud and snow that actually deforms with your tires and collision. Something like Spin Tires is a good example

http://www.youtube.com/watch?list=HL1377978284&feature=player_detailpage&v=gG2jpBGJQaU

 

And Lengthy discussion has happened on this topic. http://www.beamng.com/threads/53-Realistic-dirt/

 

Instead of asking in your post if someone posted it yet, why not use the search function?

And to answer your question, yes, it has been suggested before.

 

There's already a physics side to this, but not a graphical.