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Blender 2.75 Allows For AMD OpenCL Support

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  • Blender 2.75 Allows For AMD OpenCL Support

    Phoronix: Blender 2.75 Allows For AMD OpenCL Support

    A test build of Blender 2.75 was released this past week and it will be of interest to a lot of open-source designers and artists...

    http://www.phoronix.com/scan.php?pag....75-Test-Build

  • #2
    Are you talking about radeonsi or catalyshit?
    ## VGA ##
    AMD: X1950XTX, HD3870, HD5870
    Intel: GMA45, HD3000 (Core i5 2500K)

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    • #3
      The AMD OpenCL support is coming as the Cycles compute kernels have finally been split into smaller kernels, so they now compile and work for AMD GPUs.
      In other words, AMD has done nothing about it and the Blender/Cycles developers have worked around AMD's incompetence to fix this.

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      • #4
        Well AMD made the patch. See here for more details.

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        • #5
          Originally posted by MoonMoon View Post

          In other words, AMD has done nothing about it and the Blender/Cycles developers have worked around AMD's incompetence to fix this.
          In other words, you are ignorant of the entire code changes. AMD dumped megabytes of changes and showed Blender's inherently horrible understanding of OpenCL. They've modified their entire stack across the board all because of AMD.

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          • #6
            Originally posted by MoonMoon View Post

            In other words, AMD has done nothing about it and the Blender/Cycles developers have worked around AMD's incompetence to fix this.
            I get that it's the cool thing to do to put down AMD, but you should educate yourself to avoid looking foolish.

            In this case, it's pretty much the exact opposite of what you think.

            AMD's developers did a bunch of work to fix up the Blender code to work better: https://docs.google.com/document/d/1...dR-oiWbUY/edit
            smitty3268
            Senior Member
            Last edited by smitty3268; 27 May 2015, 02:14 PM.

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            • #7
              I'd say thanks, AMD. Hopefully I can put this to good use once I find the time to get myself into Blender. Wasn't more than a few simple geometric objects yet but will hopefully be more in the future.
              Stop TCPA, stupid software patents and corrupt politicians!

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              • #8
                I downloaded latest testbuild and made sample comparison (Core i5 [email protected] vs Radeon [email protected]) for sample scene (MiniCooper from )http://nextwavemultimedia.com/html/3dblendermodel.html):
                Core i5 [email protected]: 217.75 secs
                Radeon HD [email protected]: 188 secs

                PS: scene setup: 1280x800, sampling: final setup
                PS2: OpenCL rendering except kernel compilation.
                matszpk
                Phoronix Member
                Last edited by matszpk; 28 May 2015, 06:07 AM.

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                • #9
                  This would make AMD's APUs much more attractive. A very cheap machine could be a decent Blender rig.

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                  • #10
                    My testing is suggesting that the performance gains (with 2x 7970) are VERY little. They are comparable to CPU rendering... even on Windows...

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