Unreal Engine Issues

FX.TestGPUSort fails on Vulkan

“FX.TestGPUSort” fails on both PC Editor and Android with Vulkan RHI. ...

GetOverlappingComponents does not work on Mobile

The GetOverlappingComponents node isn't working correctly on mobile devices. It seems like it may only not be registering components that are spawned at runtime, as it does change the number of over ...

Negative Play rate in an Anim Sequence added to a Montage Causes timeline to collapse

Adding animations with a negative play rate (playing backwards) or modifying existing animations in a montage to have a negative play rate causes the timeline in the montage to "squish" and is no lo ...

WorldContextObject is null in BP function library

Arrays on multicast events called from the server are not passed to clients

Arrays that are passed into a Multicast Event as an input are not available on clients who call the function Regression?: Yes This did not occur in 4.19.2 ...

Niagara Sub UV Index ignored

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) ...

FCanvasTriangleRendererItem relies on BaseVertexIndex not being zero.

The root of this issue is that FLocalVertexFactory is doing manual vertex fetch in the shader. In HLSL, this relies on SV_VertexId. In GLSL, it's gl_VertexId. HLSL does not include the base vertex i ...

SingleLayerWater with PixelDepthOffset gives wrong refraction

We can see refraction gets distorted after we have a bigger PDO value, and it's not because the depth is more shallow, but looks like some kind of scene color texture lookup error. Also, not sure i ...

Instanced Impostors Render Black in UE5 editor

Creating 3 player splitscreen causes viewport to go black on PIE

If a game is set to play with 3 player splitscreen, starting the came will cause the viewport to go completely black. Does not occur with 2/4 players. Does not occur in standalone ...