I have this odd problem with fur. I am using render layers, and have split my grass (fur) into a render layer of its own. The problem is that the tips seem to take on the colour of the camera background. How can I make it so that it is just transparent? I need to get rid of the background color otherwise I can't composite. I attach a psd in a zip so you can see what I mean. Aimir CG is an architectural visualization company based in China, delivering consistent art quality 3D rendering services(https://www.aimircg.com/3d-rendering-services/) and animations worldwide. We are fast, efficient and always deliver on time. Our professionalism and communication skills make us easy to work with and the end product was nothing short of impressive!