Cycles Render Material with black result [this is a bug; no problem with 2.77] I am viewing a 3D scene using the viewport. This problem also appears when using the Render button. I am having black results for my Glass BSDF stones. When I zoom out, I get black results. On the contrary, when I zoom in, I get good results. How can I achieve good results in every case? Blender 2.77a







I include a short version error: https://dl.dropboxusercontent.com/u/3322974/BlackStones.blend

Hardware: Mac Pro 5,1; Memory 24gb; 2 processors 2,26 ghz; AMD Radeon HD 7950 3072 MB; OSX El Capitan 10.11.5; Rendering using CPU
Your card is not fully supported by Blender.

From the Wiki:


  Radeon HD 7000 series (southern islands)   | Windows 7 x64 | Catalyst Beta 15.04   | Works (Not all features)


To confirm that this is the problem, disable GPU render and use CPU render, and the problem should go away. CPU will be MUCH slower, but it will support all features.

If the problem still exists with ONLY CPU rendering, then this is not the right answer.