Niagara GPU Particle Flickering at Certain Angles When the System Origin is Occluded.

Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 Preview 6 CL# 5439949, and 4.23 CL# 5533539

Steps to Reproduce
  1. Open the Editor
  2. Enabled Niagara Plugin and restart the Editor
  3. Create a Niagara Emitter using the fountain template
  4. Change the fountain to be a GPU emitter and set its spawn rate to 10000
  5. Save the emitter and create a Niagara System using it
  6. Place the System in the scene and place a Box BSP in front of it

The GPU Niagara System will flicker and disappear at certain angles

The system would not flicker 

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ComponentRendering - Niagara
Affects Versions4.
Target Fix4.23
Fix Commit6279033
Main Commit6666942
Release Commit6955818
CreatedMar 25, 2019
ResolvedMay 3, 2019
UpdatedJul 25, 2019