# \[4.24\] Post-Process Materials Visible only on Right Eye (Left Eye Black)

**URL:** <https://forums.unrealengine.com/t/4-24-post-process-materials-visible-only-on-right-eye-left-eye-black/460071>\
**Category:** XR Development\
**Tags:** Post-Processing, unreal-engine, question\
**Created:** [December 31, 2019, 10:34pm UTC](https://forums.unrealengine.com/t/4-24-post-process-materials-visible-only-on-right-eye-left-eye-black/460071 "2019-12-31T22:34:07Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![RotemS](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@RotemS](https://forums.unrealengine.com/u/RotemS)\
**Post date:** [December 31, 2019, 10:34pm UTC](https://forums.unrealengine.com/t/4-24-post-process-materials-visible-only-on-right-eye-left-eye-black/460071/1 "2019-12-31T22:34:07Z")

</div>

Seems that in 4.24, Post-Process materials that are set to render **After Tonemapping** only render correctly on the right eye of a desktop headset (tested Rift, Rift-S and Vive Pro). The left eye is completely black whenever the blendable material is enabled.

- This happens only in a packaged game, not in VR PIE.
- No difference between DX11 and DX12
- Instanced Stereo makes no difference

Using vanilla 4.24.1. No issue on 4.23.1.  
Can anyone confirm, and/or know of a workaround?

---

<div class="post-metadata">

**Author:** ![Khaliman](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Khaliman](https://forums.unrealengine.com/u/Khaliman)\
**Post date:** [January 15, 2020, 2:00pm UTC](https://forums.unrealengine.com/t/4-24-post-process-materials-visible-only-on-right-eye-left-eye-black/460071/2 "2020-01-15T14:00:52Z")

</div>

yup. can confirm to.

---

<div class="post-metadata">

**Author:** ![anonymous\_user\_942e8e52](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_942e8e52](https://forums.unrealengine.com/u/anonymous_user_942e8e52)\
**Post date:** [January 15, 2020, 2:26pm UTC](https://forums.unrealengine.com/t/4-24-post-process-materials-visible-only-on-right-eye-left-eye-black/460071/3 "2020-01-15T14:26:00Z")

</div>

Hi all,

This is a known issue currently being tracked as [Unreal Engine Issues and Bug Tracker (UE-85935)](https://issues.unrealengine.com/issue/UE-85935)

I am not aware of any workarounds.