krickerd opened this issue on Aug 06, 2012 · 24 posts
superboomturbo posted Sun, 16 September 2012 at 10:52 PM
Quote - Well, I've done it. I put together my system Friday night, Saturday morning. It's working pretty well. I've run some comparitive tests in Vue 8 between my old PC and the new and the new is rendering between 2.5 to 3 times faster. The only problem I'm having so far is that I can't render scenes in Lux with the GPU. I get a runtime error. I got those GTS 450 cards and have them in SLI mode. I have the latest drivers so that's not the problem. Lux renders just fine with the CPU.
Which version of Lux are you running? 1.0 RC1 did fine with GPU, RC2 was slightly better, RC3 crashed when loading the video cards. I haven't tried it with RC4 or Lux 1.0 that was released last week.
When troubleshooting, sometimes it's easiest to start with a simple scene, such as a mesh light and a single prop. Also when building up from there, check Task Manager to see what Lux is spewing into memory. For non-hybrid (GPU only) you have to squeeze your scene into the RAM of the video card. Collect Textures comes into play here.
There was also a bug in Lux where the OpenCL workgroup need be set to 64 within Reality. It's near the top on the far right of the output tab.
I was about to boot up Studio, so I'll make a test scene for GPU and see what happens. Hope to see a nice image from you in the near future, and congrats on the new rig!
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