Unreal Engine Issues

Niagara compiler error, branch in custom hlsl doesn't work properly

Material ParticleRandom node doesn't have proper value returned in specific case

Crash when starting PIE on a World Partition level with a Niagara Component inside nested Child Actor Components

Consider an actor containing a Niagara Particle System Component, which is instantiated from another actor's Child Actor Component. When initializing PIE on a World Partition level containing this s ...

Crash when undoing emitter deletion in Niagara System

Client Ensure FShaderMapResource_SharedCode::ReleaseRHI is still referenced on exit/shutdown

Very rarely, the game client will crash on shutdown and the log will contain messages that look like: LogOutputDevice: Error: Ensure condition failed: false [File:Engine\Source\Runtime\RenderCore\ ...

Crash from RDG limit when using Warmup

We need to better detect when we need to flush to avoid hitting the RDG limit. There is no test project at the moment, more details can be found here ...

GPU Crash in Niagara Fluids template when WorldSpaceSize has a component at 0

The NiagaraFluids plugin provides several Niagara System templates to use as a starting point for the user's own Systems. The templates in category "3D Gas", such as "Grid 3D Gas Explosion", include ...

Unable to Create New Niagara User Parameter After Deletion without Niagara Editor Window Restart

When a user deletes a Niagara User Parameter within the Niagara System editor window, attempting to create a new parameter with the same name immediately after deletion results in an error. Despite ...

ENiagaraCoordinateSpace is not exposed to Python, meaning the FXConverterUtilitiesLibrary create_script_input_enum function does not work when setting that parameter.

The user was having issues with setting the correct ENiagaraCoordinateSpace enum in their python script. This enum currently exists in the engine as both a user-defined enum (which is deprecated), a ...

Opaque GPU particles appear later than translucent one when Collision module is enabled

When spawning GPUCompute Sim Niagara system which is consist of opaque particle emitter and translucent one, if those emitters use Collision module, opaque particle often appears one frame later tha ...