Can anyone please tell me what Im doing wrong? The trees are oakWhiteMedium from the visor, Modify>Paint Effects to Polygons. The grass is grassBermuda and is not converted to polygons. As you can see by these pics they somehow interact and the leaves vanish in the grass. Any help would be appreciated.

Thanks
Terry
(Sorry, I did a quick test and converted the grass to polygons, that seems to work better, but if I convert all the grass to polygons I think it will crash Maya, it did before).

Okay I think Falott had the answer in another thread.