Crash when capturing attribute spreadsheet of Niagara GPU Particle with raytracing enabled

Rendering - Niagara - Jul 8, 2021

Also, NiagaraDebugger crashes the moment I enable GPU Particle Readback. ...

When creating an asset from an Emitter with a scratch module, changes to the new module will not propagate

Rendering - Niagara - Jun 21, 2021

A scratch module made in an emitter, will not reflect the changes of its new parent when an asset is crated from the emitter. ...

FConsoleVariableBase::SetOnChangedCallback behaves incompatibly with previous versions

Rendering - Niagara - Jun 17, 2021

FConsoleVariable::OnChangedCallback was changed to a multicast delegate in 4.26. Along with this, FConsoleVariableBase::SetOnChangedCallback was implemented to emulate a single delegate for compatib ...

When Niagara is set to DesiredAge in Sequencer, the processing load increases after play

Rendering - Niagara - Jun 3, 2021

This does not happen in 4.25.4. It has been confirmed to occur with 4.26.2 and UE4main. After playback is complete, a large amount of stalls can be seen in Insight. ...

Uninitialized Critical Section exception error in Niagara/VectorVM when gflags application verifier enabled causing potential Memory Corruption

Rendering - Niagara - May 25, 2021

The following is posted from the user who submitted this issue: We noticed a crash happening in a certain area of our game, and the debugger showed it appeared to be attempting to free an invalid m ...

Crash when setting Kill Particles to true on some emitters in a Niagara System

Rendering - Niagara - May 20, 2021

When setting the Kill Particles boolean of an emitter in a Niagara System to true, the editor crashes. So far, I've only been able to reproduce the issue with the NS_EH_KP system that a user provide ...

Crash when adding an Event Write node to a Niagara Scratch Pad module

Rendering - Niagara - May 13, 2021

It seems that the crash is related to all of the "Write" events. I tested the Event ChaosDestruction Write, Event Float Write, and Event Bool Write and all 3 caused the crash, but their "Read" count ...

Material cannot be set in MaterialInterface of NiagaraParameterCollection

Rendering - Niagara - Apr 16, 2021

When MaterialInterface is added to UserParameter of NiagaraSystem, Material can be set in Properties. Also, in UE4main CL15988344, there is no MaterialInterface item in the NiagaraParameterCollecti ...

Sphere Trace Distance Field GPU function hides necessary Collision DI input

Rendering - Niagara - Apr 14, 2021

The collision DI input is a hidden input, but is necessary for compilation. The input node should likely be marked as required, not hidden.  ...

Cannot paste emitter overview node after it has been cut with ctrl+x

Rendering - Niagara - Mar 20, 2021

When pasting an emitter from a copied overview node, only the node is pasted, and it relies on duplication of the emitter to do the actual copy. When cutting a node we delete it, along with the emit ...