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Member
 
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Last Login: Tuesday, May 25, 2010 11:36 PM
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| Are you by any chance rendering on a farm? If so, have you checked to see its not one computer playing up - maybe interpreting a material / colour wrong and its affecting your lighting. Just a thought.
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Luke Cottle
Visualisation Specialist
Parsons Brinckerhoff Australia Pty Limited
www.pb.com.au  
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Über Geek
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The render farm idea is a good one. If that is the case, there might be an improperly patched version of V-Ray on the offending machine.
Mark Kauffman
Technical Lead / PA
Project Visualization TEC
Parsons Brinckerhoff, Inc.
Kauffman@pbworld.com
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"old dog"
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Claudio Branch (5/25/2010)
Turned out to be the same node returning the slightly darker frame... ...But how would this problem normally be solved - Go frame by frame identifying the bad ones and then only submit them for over-writing? A few times I've had the same issue as well, where just 1 or 2 farm machines will freak out (render light/dark/wrong gamma/missing map/flicker/etc) Usually I can just look through backburner and see which frames rendered wrong and re-submit just those frames. There were a couple of occasions where it was a big job (1000's of frames) with every 20th th 30th frame screwy. Not wanting to resubmit the whole job, and faced with the task of writting down and manually entering a few 100 or more specific frames into the farm, I came up with a unique solution: - Organize your backburner view of your finished job under the task summary by server name so you can isolate just the frames rendered wrongly by machine.
- Get that window as big as you can (if you can fit all the frames on the screen at once great, if not reapeat the next step)
- Do a windows screen-grab (I usually do shift+PrtScn) and paste into photoshop (ctrl+n , ctrl+v)
- Crop the image to just the frame list in the task ID of the images you need resubmitted and save out the image (I think tiff usually works best)
- Use an OCR software to convert the image into text (I think MS office comes with an OCR solution under Document Imaging, I've seen other free ones online)
After that you'll probably need to do some clean-up (like a search and replace to delete the word 'Frame' but for the most part you can then copy/paste the list of frames right into max to resubmit.
Made what would have been a tedious multiple-hour long process into about 3 minutes  (though it's fairly rare to have the problem) SJ
Steve JohnsonPBProject Visualization Technical Resource CenterE-Mail: johnsonste@pbworld.com...................................................................................................
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Veteran
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Member
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| In the instance where I know for sure that a specific computer has ruined all its frames - to get a list of all the frames it did I generally output a report for that job in backburner and then import it into excel, that way I have a spreadsheet of which computer did what frame and I can isolate information accordingly. Tom that script looks particularly useful - cheers for the link.
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Luke Cottle
Visualisation Specialist
Parsons Brinckerhoff Australia Pty Limited
www.pb.com.au
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