Unreal Engine Issues
Unreal Engine Issues
Linker exception opening project project after updating to 4.25.4
UE - Gameplay - Blueprint - Oct 27, 2020User has encountered an exception opening their project when they updated from 4.25.3 to 4.25.4. No repro, log or test project is given at the time. ...
Volumetric fog flicker side screen
UE - Rendering - Architecture - Nov 29, 2023The flicker is visible in Epic scalability as well, it is just smaller on screen because the fog voxels are smaller (r.VolumetricFog.GridPixelSize). ...
GoogleVR fails to package with Gradle
UE - Platform - Mobile - Aug 10, 2017Packaging with GoogleVR (Daydream) fails with Gradle enabled: https://answers.unrealengine.com/questions/678203/417-exporting-daydream-project-with-gradle-results.html ...
Can't save BPs after stopping automation tests
UE - Automation Test - Jan 5, 2018User reported that they are unable to save assets after running tests: https://answers.unrealengine.com/questions/742429/cannot-save-or-change-assets-after-running-a-autom.html ...
SweepComponent fails against non-root bodies of skeletal mesh component in PhysX
UE - Simulation - Physics - Apr 6, 2021UDN - https://udn.unrealengine.com/s/question/0D52L00005H9X5XSAV/sweepcomponent-never-returns-a-valid-hit-against-skeletal-meshes-when-using-physx?fromCase=1 ...
Landscape flatten target value and terrace interval's sliders don't take the landscape scale into account
UE - Graphics Tools - Terrain - Landscape - Mar 13, 2024This problem was originally reported in this UDN : https://udn.unrealengine.com/s/question/0D5QP000007yVue0AE/flatten-brush-limit-with-landscape-scale-z?fromCase=1 ...
UDN Bug: ASTC compression becomes greyscale
UE - Anim - Mutable - Feb 13, 2025Bug reported at https://udn.unrealengine.com/s/question/0D5QP00000tOpXN0A0/using-mutable-plugin-results-in-greyscale-textures-on-android-xr?fromCase=1 ...
Inconsistent Behavior of TFieldPath and nullptr comparison
UE - Core - Systems - Mar 7, 2025Commit 6448c6f (https://github.com/EpicGames/UnrealEngine/commit/6448c6f6d1de1e9fac9614248e06ba06b837814d) introduced inconsistent behavior for TFieldPath and nullptr comparison, depending on constn ...
[Interchange][FBX] Import of custom collision add the collision mesh material slot to the mesh material slot
UE - Editor - Content Pipeline - FBX - Jan 20, 2025cf part 2 of that UDN https://udn.unrealengine.com/s/question/0D5QP00000rP4CG0A0/interchange-custom-collision-changes-from-fbx-pipeline?fromCase=1 ...
USD Stage - Import loses UV on a skeletalmesh with animation
UE - Editor - Content Pipeline - USD - Apr 28, 2026https://forums.unrealengine.com/t/usd-import-issue-when-trying-to-import-skeleton-with-animation/2718449 I put another png has the user forgot to add theirs. ...