Niagara Crash After Adding More Than 20 Emitters to a System

Rendering - Niagara - May 24, 2019

The Editor will crash after adding more than 20 Emitters to a system. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 6574378, 4.23 CL# 6599617 ...

Crash When Trying to Find a Blueprint Class with Niagara Particles

Rendering - Niagara - May 22, 2019

Crash When Trying to Find a Blueprint Class with Niagara Particles Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 6574378, 4.23 CL# 6599617 ...

Niagara Sub UV Index ignored

Rendering - Niagara - May 16, 2019

Using the Particles.SubImageIndex has no effect on what portions of the a UV are rendered in Niagara. Tested in 4.21.2 (CL - 4753647), 4.22.1 (CL - 6063286), 4.23 (CL - 6533064) ...

Sprite size scale by velocity module has Solve forces and velocity as a post dependency

Rendering - Niagara - May 14, 2019

The size scaling should use the current frame's velocity, so this should happen after forces and velocities are solved. ...

Niagara particles are culled when opaque material blend mode added

Rendering - Niagara - May 6, 2019

Niagara particles are culled from far distances when materials with the Opaque Blend mode are applied to them. Tested in 4.21.2(CL - 4753647), 4.22.1 (CL - 6063286), 4.23 (CL - 6311794) ...

When editing a color curve at the emitter level color is not updated correctly at system level

Rendering - Niagara - May 6, 2019

Editing color curves at the emitter level will not propagate to the system level when saving and applying. The curve will look correct int the system stack, but the particle colors will not match. ...

Niagara GPU particles will always have a lifetime of one second if they use a Collision Module

Rendering - Niagara - May 2, 2019

GPU Particles will always have a lifetime of one second when using a collision module. This is a result of an issue with how off screen timing is handled. GPU particles that are off screen should on ...

Niagara Components can unregister themselves in the process of component registration

Rendering - Niagara - May 1, 2019

Spawn system attached with a system where bAutorDestroy is true and one data interface is invalid will crash the engine. ...

Assertion Failure: Cascade Particle !bPostTickComponentUpdate in same tick group as Cascade Particle system submission.

Rendering - Niagara - Apr 18, 2019

Attached Project:  [Link Removed] Since Upgrading project to 4.22, Licensee has been experiencing an Assertion crash in their built game. "I'm not exactly sure why it crashes. It's a very specific ...

Niagara Ribbons using Two Sided materials are incorrectly lit

Rendering - Niagara - Apr 15, 2019

Two Sided materials are lit incorrectly on Niagara ribbons. The sides will be flipped of how they should be. ...