# Pixelated Viewport after VR Preview

**URL:** <https://forums.unrealengine.com/t/pixelated-viewport-after-vr-preview/436099>\
**Category:** XR Development\
**Tags:** unreal-engine, Rendering, question\
**Created:** [October 21, 2018, 11:07pm UTC](https://forums.unrealengine.com/t/pixelated-viewport-after-vr-preview/436099 "2018-10-21T23:07:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![anonymous\_user\_f2430aa9](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_f2430aa9](https://forums.unrealengine.com/u/anonymous_user_f2430aa9)\
**Post date:** [October 21, 2018, 11:07pm UTC](https://forums.unrealengine.com/t/pixelated-viewport-after-vr-preview/436099/1 "2018-10-21T23:07:11Z")

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Hi, I am currently working on a VR Project where I received a quick&dirty project file and have encountered a problem when playing in VR Preview.

Before I click play everything looks fine but afterwards everything looks pixelated and quite unusual. I have to mention that in the current form the projects performance is far from ok (20fps) due to 0 optimizations. Could it be that due to the lack of fps the engine renders the frame only partly?

Before:

 ![257244-before.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/b/2/7b249f3f722c38d09356bd10f05e11846d64eb77.png)

After:

 ![257245-after.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/e/8/7e86de5680c6fb3df310d0ba6c70b20179c6ac92.png)

Furthermore the whole projects is sequenced and includes a movie file. Could it be that UE prioritizes the framerate of the movie and does everything it can to accomodate the rest to that?

Thx in advance

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<div class="post-metadata">

**Author:** ![anonymous\_user\_f2430aa9](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_f2430aa9](https://forums.unrealengine.com/u/anonymous_user_f2430aa9)\
**Post date:** [October 22, 2018, 12:25am UTC](https://forums.unrealengine.com/t/pixelated-viewport-after-vr-preview/436099/2 "2018-10-22T00:25:48Z")

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Alright saw the previous post, it’s a bug with AMD Cards,:

> **[Artifacts appearing when i go into VR preview](https://forums.unrealengine.com/questions/839444/view.html)**
>
> I am in the Demo scene for VR locomotion, but every time I switch to VR preview I get light artifacts in a grid pattern all over the scene and they don’t go away even after I stop the preview? how do I fix this?

Bug UE-64034: [Unreal Engine Issues and Bug Tracker (UE-64034)](https://issues.unrealengine.com/issue/UE-64034)

Downgraded to 4.19.2