# \[4.8\] VR preview sometimes doesn't work, bad GPU-utilisation

**URL:** <https://forums.unrealengine.com/t/4-8-vr-preview-sometimes-doesnt-work-bad-gpu-utilisation/321375>\
**Category:** XR Development\
**Tags:** UE4-8, unreal-engine, bug-report, question\
**Created:** [June 11, 2015, 9:36am UTC](https://forums.unrealengine.com/t/4-8-vr-preview-sometimes-doesnt-work-bad-gpu-utilisation/321375 "2015-06-11T09:36:12Z")\
**Posts on this page:** 1\
**Showing post:** 31

<div class="post-metadata">

**Author:** ![anonymous\_user\_e729f54e](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_e729f54e](https://forums.unrealengine.com/u/anonymous_user_e729f54e)\
**Post date:** [July 15, 2015, 1:47pm UTC](https://forums.unrealengine.com/t/4-8-vr-preview-sometimes-doesnt-work-bad-gpu-utilisation/321375/31 "2015-07-15T13:47:48Z")

</div>

Hello ,

I apologize for the miscommunication. I was referring to the integration of the solution into main (4.9). This issue did not make into the 4.8.2 hotfix as you said. However, I have included a link to the commit below if you would like to cherry pick this change list and integrate it into your project. You will need a source version of the engine if you don’t already have one. (I have included a link on how to build the engine from source). I have also provided a link to get you started on cherry picking change lists to integrate them into your project. I hope that this information helps.

Commit:

[https://github.com/Crtriplett/UnrealEngine/commit/c6899b95de6c75f992249cefc97650c104621d57](https://github.com/Crtriplett/UnrealEngine/commit/c6899b95de6c75f992249cefc97650c104621d57)

Building from source

Video:

> **[How To Build Unreal Engine 4 (UE4) From Source Code](https://allarsblog.com/2014/09/25/build-source/)**
>
> People keep asking me how to build the engine, so I put together a really basic
> video on how to compile UE4 \[https://www.unrealengine.com\] from Epic's Github
> \[https://github.com/EpicGames/UnrealEngine\].

or

Documentation:

> **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)**
>
> After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — https://unrealcommunity.wiki/! You will be able to find content from...

How to Cherry pick (This should get you started):

Make it a great day

---

_[View the full topic](https://forums.unrealengine.com/t/4-8-vr-preview-sometimes-doesnt-work-bad-gpu-utilisation/321375)._