Ribbon particles moving fast are inconsistent in initial position.

Rendering - Cascade - May 21, 2019

The fast-moving ribbon particle trail looks different on the server and client. It looks as though the client was drawing the previous frame. ...

Flickering / Color Shift in Right eye with Cascade Particle + Instanced Stereo

Rendering - Cascade - May 13, 2019

Flickering or shifted color will be seen in the Right Eye. User reports that moving the nodes from the material function to the base graph resolves the issue. Confirmed in 4.23 MAIN branch @ CL 6 ...

Adding an LOD while in PIE or Simulate Cauases the Editor to Crash

Rendering - Cascade - Apr 29, 2019

If you add an LOD while the editor is simulating or playing, the Editor Crashes. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5660361, 4.23 CL# 6063286 ...

Client crashes when executing seamless travel with an active particle system in the level that was spawned at runtime

Rendering - Cascade - Apr 16, 2019

Clients crash when being part of a Seamless Travel if there was an active particle system in the level that was spawned at runtime. If the travel is not seamless, the particle system is placed in th ...

Changing particle system template via Blueprints crashes Editor and packaged game

Rendering - Cascade - Apr 4, 2019

Setting a ParticleSystem component in a Blueprint to none/null with a "Set Template" node causes the editor and the packaged project to crash. I have noticed this when migrating my game to 4.22, whi ...

Pivot Offset Module does not respect on/off toggle

Rendering - Cascade - Mar 22, 2019

Toggling the Pivot Offset module in a Cascade Particle System has no effect on the particle system's position. Tested in 4.20.3 (CL - 4369336), 4.21.2 (CL - 4753647), 4.22 (CL - 5439949), 4.23 (C ...

Data Tables with 'ParticleSysParam' structs cause crash

Rendering - Cascade - Feb 4, 2019

Data Tables with 'Particle Sys Param' structs in them as variables will crash when opened. ...

GPU Particle Initial Color With Distribution Constant Curve Will Not Transition Between Points

Rendering - Cascade - Jan 24, 2019

GPU Particles will only use the first point of an Initial color module with Distribution set to Constant Curve. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.222 CL# 4768593 ...

GPU Particle Preview Flickering with Distance Field Collision

Rendering - Cascade - Jan 15, 2019

When switching from Scene Depth Collision to Distance Field Collision for a GPU particle system the preview window flickers, but returns back to normal when switching back to Scene Depth. Found in ...

Incorrect Particle Translation When Reactivated

Rendering - Cascade - Oct 30, 2018

When attaching a ribbon particle system to a moving object, undesired/unexpected effects take place when the object moves out of camera view.  Found in 4.19 CL# 4033788, 4.20 CL# 4369336, 4.21 CL# ...