Unreal Engine Issues
Unreal Engine Issues
Compiling any material in UE 5.5.1 without ShaderCompiler JobCache results in a crash
UE - Rendering Architecture - Shaders - Jan 15, 2025Compiling any material with r.ShaderCompiler.JobCache=0 causes ShaderCompileWorker to crash. Reproduction steps cause a crash during Editor startup, but this bug may affect other scenarios where mat ...
Popping Ribbon UVs
UE - Niagara - Mar 10, 2025Please see the Additional Link for related UDN information. The UV popping described can be subtle, depending on settings; it's affected by spawn rate and GPU vs CPU. The popping shown in the gif t ...
Child blueprint reference to self node unpins after close and reopen from Set Array Element node
UE - Gameplay - Blueprint - Jun 1, 2015If a child blueprint attempts to set an array element of self to an array of the parent blueprint, then the editor is saved, closed, reopened, the self pin will disconnect from the Set Array Element ...
This project crashes when opening most maps after converting to 4.7 Preview 5
UE - Gameplay - Blueprint - Feb 4, 2015This project crashes when opening most maps after converting to 4.7 Preview 5. Also crashes after converting to 4.8 Main (tested in //depot/UE4/Promotable-CL-2429371). Crash log attached. Crash R ...
Editor primitives render incorrectly in stereoscopic with instanced stereo
UE - Platform - XR - Aug 17, 2016Trigger box icons move around when oculus head movement is used. Found in //UE4/Release-Staging-4.13 @ 3090357 QA-Promotion map Edit: 08-22: This affects volumes as well as their editor icons, upd ...
Using Blend Physics Weight causes skeletal mesh to spin at high speed
OLD - Anim - Mar 5, 2015When Phyics Blend in the PHAT editor is set between 0 and 1, the user character will spin wildly. User has image of this affecting character in game whereas I was only able to replicate it in the PH ...
Projects using a class that inherits from SceneCapture2D may crash on launch on iOS devices
UE - Platform - Mobile - Jan 4, 2016If a project uses a class that inherits from SceneCapture2D and sets the render target via code, the project will crash on launch on an iOS device. The project runs normally on PC and Android. Proj ...
Changes to Landscape Thickness not propegated to PhysX
UE - LD & Modeling - Terrain - Landscape - Jun 3, 2015In 4.8 preview 4, it appears that changes made to a landscape actor's CollisionThickness property in the editor are not being replicated in physX [...] It appears that what happens is that the engin ...
Editor tabs switch when pressing stop during PIE
Tools - Apr 6, 2015While playing in PIE, the editor switches back to the main tab when you're in the blueprint tab after you've pressed 'stop'. Therefore, if you're debugging a situation within the blueprint, you're i ...
Using FEditorModeID for the "Mode" console command does not switch the modes tab
Tools - May 10, 2016Using the FEditorModeID for the different editor modes does not affect actual modes available in editor Modes tab. Example: Command "Mode EM_Foliage" does not switch to the foliage mode Workaround ...