[Radiance-general] plants and trees library

[gurneet]

hi,
i am doing a simulation of a school, the school has got many coutyards and
green area
, so for that i need a large variety of plants and trees.
it would be really helpful if anybody could give me a link from where i can
downloads
different trees and plants , or if there is some command or routine in
radiance(linux)to make green plants
.also if somebody could suggest how should i reprsent grass in the
courtyards
gurneet