# \[\] Viewing shader complexity in VR causes crash

**URL:** <https://forums.unrealengine.com/t/viewing-shader-complexity-in-vr-causes-crash/352428>\
**Category:** XR Development\
**Tags:** UE4-11, unreal-engine, crash, question\
**Created:** [April 1, 2016, 12:39am UTC](https://forums.unrealengine.com/t/viewing-shader-complexity-in-vr-causes-crash/352428 "2016-04-01T00:39:50Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Slayemin](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Slayemin](https://forums.unrealengine.com/u/Slayemin)\
**Post date:** [April 1, 2016, 12:39am UTC](https://forums.unrealengine.com/t/viewing-shader-complexity-in-vr-causes-crash/352428/1 "2016-04-01T00:39:50Z")

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I downloaded and ran the UE4 build from source code.

**build configuration:** “DebugGame Editor”

**VS Edition:** Visual Studio 2015 Community Edition

**VR HMD:** Pre

Repro steps:

1. Start SteamVR compositor
2. Create an empty C++ project
3. Wait for starter scene shader compiler to complete
4. Start up VR Preview and view with HMD
5. Press “F5” to see shader complexity
6. Crash!

Crashes on PostProcessing.cpp : Line 1749

Output:

[2016.04.01-00.37.38:630][283]Set new viewmode: ShaderComplexity  
Assertion failed: !FSceneRenderTargets::Get(RHICmdList).SeparateTranslucencyRT [File:C:\UnrealEngine\Engine\Source\Runtime\Renderer\Private\PostProcess\PostProcessing.cpp] [Line: 1749]

Note: If you run a stand alone window, there is no crash.

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<div class="post-metadata">

**Author:** ![Slayemin](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Slayemin](https://forums.unrealengine.com/u/Slayemin)\
**Post date:** [April 1, 2016, 12:48am UTC](https://forums.unrealengine.com/t/viewing-shader-complexity-in-vr-causes-crash/352428/2 "2016-04-01T00:48:05Z")

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Additional Notes:

**Video Card:** NVidia GTX 970

**Driver:** 362.00

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<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:** [April 11, 2016, 6:57pm UTC](https://forums.unrealengine.com/t/viewing-shader-complexity-in-vr-causes-crash/352428/3 "2016-04-11T18:57:20Z")

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Hello ,

I was able to reproduce this issue on our end. I have written up a report (UE-29330) and I have submitted to the developers for further consideration. I will provide updates with any pertinent information as it becomes available. Thank you for your time and information.

Make it a great day