I downloaded Blender v2.77 and try to render Suzanne with HDRI Lighting.

First I've used a glossy shader, then a glass shader and it surprises me that the glass shader totally looks like glossy, it's not glass. When I switch back to Blender v2.76b and render the same file again, everything goes fine, glass is glass and glossy is glossy. See the images and the test file below.


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Any ideas?

  • $\begingroup$ Can't reproduce the issue i.stack.imgur.com/2Gdax.png. It does look like a bug. $\endgroup$
    – user1853
    Mar 23, 2016 at 2:26
  • $\begingroup$ in the future please use blend-exchange.giantcowfilms.com to upload your file. Links to Pasteall.org diappear after a few weeks and then your post will not be complete. $\endgroup$
    – user1853
    Mar 23, 2016 at 2:28
  • $\begingroup$ Same here, I'm glad I'm not alone :). I've got a Sapphire R9 390 NITRO 8 MB ram, 2.76b works perfectly (CPU, GPU supp and exp), 2.77 has that glass/glossy bug only with GPU. I'm going to try various Crimson driver versions, from 15.12 to the latest (16.3.2). $\endgroup$
    – kastaldi
    Apr 3, 2016 at 14:00
  • $\begingroup$ Does it look like that in the preview rollout panel too? $\endgroup$
    – PGmath
    Apr 3, 2016 at 14:15
  • $\begingroup$ If it works on the AMD card in 2.76 and not 2.77, then this is definitely a regression which should be reported $\endgroup$
    – gandalf3
    Apr 3, 2016 at 18:42

1 Answer 1


I cannot confirm this. Glass looks totally normal in 2.77, GPU and CPU.

Some things to check for you:

  • Do you use a 2.77 release, not a beta or rc version?
  • Do you maybe use Feature set: Experimental?
  • If it's on GPU, got all the latest drivers?

enter image description here

  • $\begingroup$ I use AMD Radeon HD 7770 GPU, update latest driver, i download the newest blender 2.77 release, not RC, even the msi set up and the zip file, and it's still not work for me, but when i try the same file with Nvidia GTX GPU, every thing goes fine, may be AMD Graphic Card is not fully support yet, i'll find other way to make glass. $\endgroup$
    – Nobita87
    Mar 22, 2016 at 5:34
  • $\begingroup$ Well yeah, you should have mentioned the Radeon card. AFAIK Radeon is still experimental. Does it render correctly when you use the Radeon card, but render on CPU? Good luck! $\endgroup$
    – bortran
    Mar 24, 2016 at 8:09

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