particles physics (footprints on snow as on sintle)

hi everyone
since i watched sintle and there is a question i want to ask some1 about
so its good i am here and alot of good people here too lol xD
anyway

i want to ask about how to make footprints on sand or snow or any kind of prints on sand or snow like if i want a complicated machine fall from the sky and leave prints or something lol xD
so i guess its about particles.
i havent got really into particles physics in blender (i was working on 3D max and not bad at it so i know how the particles thing should go xD)
so if anyone could tell me how to do it or atleast show me any tutorials about it i would be so thankful :slight_smile:

ROUBAL has one.
http://3d-synthesis.com/Displacement_Tutorial.html

You can also use Dynamic Paint to make footprints, for example by having your falling object change a displacement texture.