There are tiled artifacts that appear on Mac Sierra when reflection captures overlap.

Tested with Asset #3595
MacOS Sierra Version: 10.12.1
NVIDIA GeForce GT 750M Driver: 367.15.10.05f01

Steps to Reproduce

1. Open UE4 on Mac running Sierra
2. Setup a level with a Reflective material surface
3. Added two reflection captures that overlap
4. Build Lighting and move the camera around or separate the reflection captures so that you are seeing an overlapping area.

Results: Tiled Artifacts on the Mac with Reflection Captures that overlap.

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Cannot Reproduce
ComponentUE - Graphics Features
Affects Versions4.144.15
Target Fix4.16
CreatedDec 16, 2016
ResolvedApr 13, 2017
UpdatedApr 27, 2018
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