Hi how do i make so like grass dosent go through the stones that i have in my yard project that im making?
you can do that with a force field.
The force field, buttons is besides the particles buttons.
ye but the stones aint round they got many shapes… how do i do then?
hmm… The plane you got the patricles on, it should be with may vertexes. So… if you wheight-paint where the stones is (make the brush 0.0) and then make a vertex group for the vertexes (and paint). And Then write the name in the patricles interface.
Sorry if its a bit unclear explatination, but dunno how to explain it. ;)…
hope you understand
ok i will try thx for your help 
no prop