I've been mucking around with trees and other plants in my project, however, whenever I use the vegetation shader from the system shaders addon, it turns out looking unusually dark (see attached pic). Regions that aren't directly facing the sun or another light source end up looking almost black. I was wondering; why does this happen, and how can it be avoided? Also, have other people managed to get any good results with the vegetation shader?

I also need the skinmesh to be affected by changing light levels which, I suppose, rules out using some kind of emissive shader to control how bright the object appears.

Thanks in advance for any advice people can offer,

Regards,

George.