# Issue with Gmask Creating TV Damage Offset During Animation

**URL:** <https://forum.logik.tv/t/issue-with-gmask-creating-tv-damage-offset-during-animation/11108>\
**Category:** Flame Questions\
**Tags:** batch\
**Created:** [July 25, 2024, 7:56pm UTC](https://forum.logik.tv/t/issue-with-gmask-creating-tv-damage-offset-during-animation/11108 "2024-07-25T19:56:03Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![0wen](https://avatars.discourse-cdn.com/v4/letter/0/7cd45c/32.png) [@0wen](https://forum.logik.tv/u/0wen)\
**Post date:** [July 25, 2024, 7:56pm UTC](https://forum.logik.tv/t/issue-with-gmask-creating-tv-damage-offset-during-animation/11108/1 "2024-07-25T19:56:03Z")

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![Capture d’écran 2024-07-25 à 21.52.22](https://us1.discourse-cdn.com/flex020/uploads/thedepartmentofexternalservices/original/2X/3/3b8fc8f321db1adc5b2c8e1db1fc11805a4a3185.jpeg)  
Hello everyone,

I’m experiencing a problem with my Gmask and I’m hoping someone here might be able to help. Whenever I create a Gmask and then animate it, I notice a strange TV damage offset effect appears along the borders. This distortion is making it impossible for me to perform accurate roto work.

Has anyone else encountered this issue or have any suggestions on how to fix it? Any advice would be greatly appreciated.

Thanks in advance for your help!

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**Author:** ![ytf](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/ytf/32/109_2.png) [@ytf](https://forum.logik.tv/u/ytf)\
**Post date:** [July 25, 2024, 8:11pm UTC](https://forum.logik.tv/t/issue-with-gmask-creating-tv-damage-offset-during-animation/11108/2 "2024-07-25T20:11:18Z")

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Interlacing. Not knowing how the project is set up, what the source footage is or what mode you should be rendering in, I can’t say if it’s wrong or not, but you are looking at an interlaced frame on a progressive monitor.

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**Author:** ![AndyBrown](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/andybrown/32/708_2.png) [@AndyBrown](https://forum.logik.tv/u/AndyBrown)\
**Post date:** [July 26, 2024, 10:28am UTC](https://forum.logik.tv/t/issue-with-gmask-creating-tv-damage-offset-during-animation/11108/3 "2024-07-26T10:28:49Z")

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Other option might be motion blur turned on in the gmask

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**Author:** ![paul\_round](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/paul_round/32/389_2.png) [@paul\_round](https://forum.logik.tv/u/paul_round)\
**Post date:** [July 26, 2024, 10:35am UTC](https://forum.logik.tv/t/issue-with-gmask-creating-tv-damage-offset-during-animation/11108/4 "2024-07-26T10:35:46Z")

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Definitely interlacing, I’ve just replicated it .

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**Author:** ![0wen](https://avatars.discourse-cdn.com/v4/letter/0/7cd45c/32.png) [@0wen](https://forum.logik.tv/u/0wen)\
**Post date:** [July 26, 2024, 4:33pm UTC](https://forum.logik.tv/t/issue-with-gmask-creating-tv-damage-offset-during-animation/11108/5 "2024-07-26T16:33:17Z")

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thanks for the help ! i added a field merge and it fixed it 😉

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**Author:** ![0wen](https://avatars.discourse-cdn.com/v4/letter/0/7cd45c/32.png) [@0wen](https://forum.logik.tv/u/0wen)\
**Post date:** [July 26, 2024, 4:34pm UTC](https://forum.logik.tv/t/issue-with-gmask-creating-tv-damage-offset-during-animation/11108/6 "2024-07-26T16:34:12Z")

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I figured it out now, thanks so much tho 🙂  
I added a field merge and it fixed it.