Unreal Engine Issues

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

LiDAR assets do not render in after relaunching the engine

LiDar point clouds are failing to render when saving and relaunching the project This issue is occurring in //UE5/Release-5.3 @ CL 26560699 This issue is occurring in //UE5/Release-5.3 @ CL 2600198 ...

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 ...

Issues converting enum to byte in BP

User experienced unexpected AI behavior and was kind enough to share a stripped down version of the project. I was able to nail down issues user was experiencing to failed enum-to-byte conversion. U ...

iOS - Launch On - Application Crashes on device, on iOS 8 devices

Blueprint Template Launch On from Mac crashes on device. ...

Adjustments to the GearVR IPD do not seem to work

A user is reporting that enabling the override for the IPD with GearVR doesn't work. They would like to be able to change this value at runtime. Setting the "bOverrideIP=True" and "IPD=" values in ...

WorldCoordinate3Way produces Incorrect Axis Lerps

The Material Function WorldCoordinate3Way seems to incorrectly perform the Lerps from the axis contributions of the normals. An example is show here, with the left objects using the version that com ...