Unreal Engine Issues

Crash occur when switching the Ray Tracing shadow function when only shadow is enabled in the Ray Tracing

According to the licensee, this problem is caused by a variable inconsistency in Cvar. The cause seems to be the difference between the CVar reference when generating RayTracingSceneRHI and the CVa ...

Functions containing Unicode characters break nativization on Clang-hosted target platforms.

The UHT boilerplate code that's generated from a converted Blueprint class header file generated from a Blueprint class containing one or more function names with non-ASCII characters will fail to c ...

Double quotes in SetupAndroid.bat may cause issues in paths

There are a few ways to end up with double-quoted paths inside of double quotes, including the case where user path does not already contain any paths. ...

Crash running construction script after compiling BP function library

Editor can assert when changing the signature of an editor authored Blueprint Library Function (FuncA) if that function is called from a Blueprint Library Function (FuncB) via an actor's constructio ...

Many native-only interfaces incorrectly appear as implementable by blueprints

Right now, any UINTERFACE that is not marked as CannotImplementInterfaceInBlueprint is shown as implementable in blueprint. If these functions have BlueprintCallable functions or related things then ...

Crash renaming nested struct member while the pin is split on a node

Crash occurs when the user renames a nested struct member variable while there's a struct pin split in a blueprint. ...

Item of Console Variables on Device Profiles is displayed incorrectly when Editor setting is other than English

If the Editor is in English, it will be displayed correctly. ( r.*)[Image Removed] This issue depends on the display language of the Editor and seems to occur in languages other than English. I al ...

Fbx importer test only if there is one key to determine if the import contain animation

We should test two key instead since one key is a constant value. We have to make sure it did not break any current pipeline. But my guess is no. The question we should verify is, is users were put ...

Dragging and dropping new materials into Dynamic Material Instance slot results in crash

Packaged Paper2D game using Flipbooks crashes when opening Level

Paper2D game using Blueprint Actor with Box Collision and Flipbook Component crashes frequently when loading levels in packaged Development Build. Reported and tested in versions 4.25.3(CL 139427 ...