Unreal Engine Issues

Emissive material lighting falloff regression in GPU Lightmass

Forum user noted that emissive lighting being built with GPU Lightmass is in fact being built, just not around the mesh, but in a larger radius and with reduced strength compared to 5.1.1. They foun ...

Crashes occur when creating a static texture from a non-HDR Cube Render Target in DirectX12

While working with DirectX 12 in the project settings, the editor crashes by check() code when attempting to create a static texture from a non-HDR Cube Render Target asset. This crash doesn't occur ...

TSR & WPO - Distortion around mesh edges

The background around a mesh moving via WPO is distorted. Mesh is correctly outputting velocities. ...

[AI] BehaviorTreeComponent fails to run a new tree if the current tree ends with a latent abort

If a BT ends with a latent abort with another BT asset pending initialization, the BehaviorTree component will stop the tree that was aborted, but it does not start the new tree. You can check with ...

Hardware Accelerated Video Decoding with DirectX 11 causes videos to render black when loaded in a Media Player

This is not a regression. Tested in //UE5/Release-5.2 CL26001984. Hardware Accelerated Video Decoding requires DirectX 11, but it appears the combination causes media players to only render a black ...

[Audio Modulation] - Ensure is thrown when attempting to modulate a Source Effect at runtime

Does *not* occur in editor. Only in standalone and runtime. Occurs when modulating Chorus or Bit Depth Also occurs in 5.2 and 5.3. I also noticed the test with this is supposed to set the chorus e ...

Attribute Reader + Torus Shape Location module cause NaNs in CPU Niagara systems

It appears using the attribute reader with the shape location module set to torus will cause NaNs. The log mentions Sphere Radius among them, which should not be used with the torus mode. ...

UHT doesn't warn that a class/structure size is larger than 65535

[MetaSounds] - Trigger inputs called by Execute Trigger Parameter refire on MetaSounds that become active after virtualization

If trigger execute is called in Blueprint, it will fire every time the sound recovers from being virtual, even if it has not been called again. See video example: [Link Removed] Also occurs in Re ...

Scene View Extension - Subscribing to Tonemap's afterpass renders black screen

Callbacks for the Tonemap's afterpass that return identity return black screen unless there is a post-process material. ...