Distributed bucket rendering - Incorrect rendering?

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  01 January 2013
Distributed bucket rendering - Incorrect rendering?

Hi everyone.

So I finally got around to setting up another computer to assist with my rendering. I installed my copy of 3ds Max 2013 and made sure all settings were the same (such as gamma).

After setting everything up, I rendered my scene -> Down from 4 minutes to 1m39s \o/

However, I then looked at the result and realized something wasn't quite right - some buckets were off-coloured.

I tried rendering again, this time watching the renderer window and got this (before I cancelled it):

Does anyone have any ideas on how to fix this up? I've searched all over Google and while I've found some people experiencing these issues, there weren't any solutions.
  01 January 2013

it looks as a FG-Map Problem. Have you test your system with a simple Scene Teapot+Plane+Daylight?

hot chip
  01 January 2013
If I do the rendering on either computer by itself (that is, no distributed buckets) the colours are consistent (that is, no 'blocks' are visible). (I'm not sure if that answers your question)

I rendered without FG and you're right: It is indeed a final gather issue (it looks consistent and correct without FG).

Last edited by Aikku : 01 January 2013 at 02:42 PM.
  01 January 2013
I think I've found a solution, but I'm not sure why it works:

I changed "Project FG Points From Camera Position" to "Project FG Points From Positions Along Camera Path" and there's no more 'blocks'.


Wait, nevermind. I used the wrong camera - 'blocks' are still there.
  01 January 2013
Turns out I was wrong yet again.

The issue occurs even without FG (it's just more noticeable).

Does anyone have any ideas? I really, really, REALLY would rather not go back to using a single computer for rendering.
  01 January 2013
It may be about maps as well. For some reason I don't know, mental ray used to give "Bitmap not recognized" errors, while it is perfectly recognized when rendered alone. May be due to differences in some configuration, often gif and hdr files (but not limited to those two formats) are not recognized when a slave is added - which means the buckets rendered with that slave will eventually render black - or it's reflections or Indirect Illumination will be different.

I don't have the issue for some time. Try syncing all max folders. Also I ve had issues with Use mental ray map manager option in process options. Not related to our problem but it renders seams of maps in DBR mode. Ive had issues with scanline option turned on. Sometimes I switch to scanline render the back to MR and some problems dissappear.
  01 January 2013
Well, few objects have actual maps (that is, non-procedural ones) and the ones that do render correctly (for each bucket, anyway), so I don't think it's a map issue.

I also tried playing around with the Use Mentalray Map Manager option, and switching to Scanline Renderer then back to MR, but nothing worked. =/
  01 January 2013
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