# PArray motion blur issue

**URL:** <https://forums.chaos.com/t/parray-motion-blur-issue/24401>\
**Category:** Issues\
**Tags:** particles, motion-blur\
**Created:** [June 17, 2010, 2:52pm UTC](https://forums.chaos.com/t/parray-motion-blur-issue/24401 "2010-06-17T14:52:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![stef.thomas](https://avatars.discourse-cdn.com/v4/letter/s/b4bc9f/32.png) [@stef.thomas](https://forums.chaos.com/u/stef.thomas)\
**Post date:** [June 17, 2010, 2:52pm UTC](https://forums.chaos.com/t/parray-motion-blur-issue/24401/1 "2010-06-17T14:52:56Z")

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Not sure if the problem lies with Max or Vray but I’m having trouble getting a waterfall I created with PArray to render with motion blur using a standard cam and the vray camera overrides.

I keep getting the message: ‘Object PArray01 has changing topology, can’t motion blur mesh deformations’

I’m not sure which setting I should change to remedy this though.

 ![PArray.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/1/3/13c4a90a58f5a772a6681ecaac2cf177046e4f2f.jpeg)

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**Author:** ![3DMK](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/3dmk/32/388_2.png) [@3DMK](https://forums.chaos.com/u/3DMK)\
**Post date:** [June 17, 2010, 11:46pm UTC](https://forums.chaos.com/t/parray-motion-blur-issue/24401/2 "2010-06-17T23:46:40Z")

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> [@stef.thomas](#):
>
> Not sure if the problem lies with Max or Vray but I’m having trouble getting a waterfall I created with PArray to render with motion blur using a standard cam and the vray camera overrides.
> 
> I keep getting the message: ‘Object PArray01 has changing topology, can’t motion blur mesh deformations’
> 
> I’m not sure which setting I should change to remedy this though.

try doing a quick search as I believe this issue has already been raised [unfortunately without a solution due to technical reasons]