I'm having an issue with some shaders.
I've done basic texturing to a river scene and it looks fine in the RTP. When I try to do a test render, the grass area only appears at the very edge of the river, then disappears and it appears black (I don't think it's my water shader, as the same thing happens if I delete it.) Not sure if it's some kind of clipping issue.
Any thoughts what's happening?
Thanks in advance
Simon