# Reflection artifacts with multiple reflection captures

**URL:** <https://forums.unrealengine.com/t/reflection-artifacts-with-multiple-reflection-captures/378729>\
**Category:** Rendering\
**Tags:** Reflections, artifacts, unreal-engine, bug-report, Rendering, UE4, question\
**Created:** [December 8, 2016, 5:54pm UTC](https://forums.unrealengine.com/t/reflection-artifacts-with-multiple-reflection-captures/378729 "2016-12-08T17:54:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![CraftedCart](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@CraftedCart](https://forums.unrealengine.com/u/CraftedCart)\
**Post date:** [December 8, 2016, 5:54pm UTC](https://forums.unrealengine.com/t/reflection-artifacts-with-multiple-reflection-captures/378729/1 "2016-12-08T17:54:58Z")

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![117902-screen+shot+2016-12-08+at+5.42.46+pm.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/e/e/5/ee51eab1bfa9bbd3efe9f48b657f3725bdbf93ab.png)

When using multiple reflection captures, artifacts in the form of squares appear over my scene (See above). These reflections also seem to flicker.

I doubt this is due to my capture setup, as the same artifacts appear when loading up Epic’s Reflections project. Could be a bug?

If it helps, here is my setup:

 ![117906-screen+shot+2016-12-08+at+5.50.52+pm.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/5/9/859c78ac037fec336da105918633b5b57d5a65f1.png)

Using an iMac  
OS: macOS Sierra 10.12.1  
GPU: NVIDIA GeForce GT 750 M

I would test using OpenGL instead of Metal for rendering, however I don’t know how to change it (Or even if you can)

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**Author:** ![Tim\_Hobson](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Tim\_Hobson](https://forums.unrealengine.com/u/Tim_Hobson)\
**Post date:** [December 16, 2016, 3:57pm UTC](https://forums.unrealengine.com/t/reflection-artifacts-with-multiple-reflection-captures/378729/2 "2016-12-16T15:57:29Z")

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Hi CraftedCart,

I just submitted a ticket for this that you can track here: [Unreal Engine Issues and Bug Tracker (UE-39865)](https://issues.unrealengine.com/issue/UE-39865)

This looks to be a visual artifact that happens with any overlapping. Hopefully we can resolve this soon.

-Tim