# Sub UV Animation from 4.11 to 4.12 (particle trimming) stops working

**URL:** <https://forums.unrealengine.com/t/sub-uv-animation-from-4-11-to-4-12-particle-trimming-stops-working/361426>\
**Category:** Character & Animation\
**Tags:** unreal-engine, UE4, question\
**Created:** [June 20, 2016, 1:34pm UTC](https://forums.unrealengine.com/t/sub-uv-animation-from-4-11-to-4-12-particle-trimming-stops-working/361426 "2016-06-20T13:34:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![FreddyHoops](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/freddyhoops/32/613305_2.png) [@FreddyHoops](https://forums.unrealengine.com/u/FreddyHoops)\
**Post date:** [June 20, 2016, 1:34pm UTC](https://forums.unrealengine.com/t/sub-uv-animation-from-4-11-to-4-12-particle-trimming-stops-working/361426/1 "2016-06-20T13:34:16Z")

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When converting effects from 4.11 to 4.12, the particle trimming from the sub UV animation set type set in 4.11 stops working, so the particles look as normal.

If I reset the Sub UV animation in the emitter module it resets all of the sub UV animations. For example if an effect has multiple emitters with sub UV animation modules they all work when one is reset.

Also if the level if the effect is saved and the level and editor re-started, the effect reverts back to a normal sprite.

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**Author:** ![anonymous\_user\_280dd372](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_280dd372](https://forums.unrealengine.com/u/anonymous_user_280dd372)\
**Post date:** [June 20, 2016, 7:36pm UTC](https://forums.unrealengine.com/t/sub-uv-animation-from-4-11-to-4-12-particle-trimming-stops-working/361426/2 "2016-06-20T19:36:18Z")

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Hi ,

Thanks for reporting this! I was able to reproduce it and have entered UE-32237.

I did find a workaround for you though. I assume you’re upgrading your project by using “Create a Copy”. Instead of doing that, manually make a copy of your project(so you have a backup) and then go to More Options\>Convert-In-Place. For me, that method mitigated the bug.

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<div class="post-metadata">

**Author:** ![FreddyHoops](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/freddyhoops/32/613305_2.png) [@FreddyHoops](https://forums.unrealengine.com/u/FreddyHoops)\
**Post date:** [June 20, 2016, 7:48pm UTC](https://forums.unrealengine.com/t/sub-uv-animation-from-4-11-to-4-12-particle-trimming-stops-working/361426/3 "2016-06-20T19:48:53Z")

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I’ll do that thanks.