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Old 11-02-2012, 01:17 PM   #1
Join Date: Mar 2006
Posts: 84
mental ray render missing tiles


Im rendering a sequence in softimage 2012 with mental ray.

im rendering it out as tga files, and I am getting missing render tiles in the stills every 5~10 frames or so. not sure what it is. the render settings are pretty default.

So far I rendered out a pass with final gathering, ambient occlusion and a matte pass, and they all have missing tiles.

could it be a hardware issue? I have rendered out sequences with the same workflow on a different machine with no problems. Right now im rendering on my notebook with a quad core i7, 6gb ram and nvidia gt 540m.

Old 11-09-2012, 09:56 PM   #2
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Manny Papamanos
Autodesk 3D Support specialist/Teacher
Montreal, Canada
Join Date: Apr 2002
Posts: 105
Most likely you are running out of ram.
Look at your memory consumption as you render.
Manny Papamanos
Softimage|Mobu Support Specialist

Author of: training DVDs.

Old 11-09-2012, 10:27 PM   #3
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Earth, Romania
Join Date: Aug 2005
Posts: 470
Went through this ordeal on a recent xsi project...had plenty of ram on each machine.
Interesting thing was, it only happened on lighter scenes or passes. The heavy stuff was coming out okay.
But whenever we had a bg pass, it would skip tiles all over the place.
Eventually nailed it down to a checkbox: render manager - mental ray - framebuffer - on disk framebuffers toggled off. (have to thank stephen blair for the tip).
Though make sure you leave it on if you're using custom framebuffers using the "store color in channel" nodes.
That did the trick for us.

Last edited by oktawu : 11-09-2012 at 10:30 PM.
Old 11-09-2012, 10:27 PM   #4
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