For those who are interested in enhancing light effects, I am public-domaining some textures and a script for making tree shadows.
For example:
http://www.sluniverse.com/pics/pic.aspx?id=9604
Linden Trees included so far are:
Cypress Tree 1
Cypress Tree 2
Dogwood
Eucalyptus
Oak Tree
Pine Evergreen
Pine Ponderosa
Palm Tree 1
Palm Tree 2
I have also included a little notecard explanation, a 100% alpha texture for those who don't have one, and an example of a 1-prim shadow and a 2-prim shadow.
I've set it out in the ExtroVirtual Village (Bragg 230,71), just to the right of the windmill (where the merry-go-round building tutorial is also available). It's in a cube set to sell contents for L$1 (pardon the 1 dollar -- that just lets me see how many people pick it up, which is a little more fun)
http://www.sluniverse.com/pics/pic.aspx?id=13290&sort=PictureID+desc
p.s. for newer members: the Linden trees themselves can be found in your Library in your inventory, under Objects. For those who haven't played around with Linden trees, I believe you can only plant trees if you or your group actually own the land where you try to rez the object