Unreal Engine Issues
Unreal Engine Issues
delete_all_material_expressions_in_function Doesn't delete all expressions in one go.
UE - Rendering - Architecture - Materials - May 24, 2024UDN: https://udn.unrealengine.com/s/case/500QP000009NxNBYA0/deleteallmaterialexpressionsinfunction-doesnt-delete-all-expressions-in-one-go?fromCase=1 A UDN user is reporting that the delete_all_mat ...
Outliner freezes when searching in large maps
UE - Editor - Verse Class Editor - Jul 24, 2024This is because SSceneOutliner::FullRefresh is called every time the search text changes, which repopulates the whole tree. There's a few options to look into here (first two might be tricky with b ...
Fix PrimitiveComponent overlap indirection
UE - Simulation - Physics - Sep 27, 2016When doing overlap tests in PrimitiveComponent, UWorld->ComponentOverlapMulti is used. The callstack for that ends up looking like this (callstack is inverted, highest level on top): UWorld::Compo ...
Thumbnail of material is not previewed if FSoftObjectPath is used.
UE - Editor - Content Pipeline - Import and Export - Jun 11, 2018https://udn.unrealengine.com/questions/437463/%E3%83%9E%E3%83%86%E3%83%AA%E3%82%A2%E3%83%AB%E3%81%AE%E3%82%B5%E3%83%A0%E3%83%8D%E3%82%A4%E3%83%AB%E3%81%8B%E8%A1%A8%E7%A4%BA.html ...
Disappearing components in Level Sequencer Spawnable Camera
UE - Anim - Sequencer - Mar 11, 2019I believe this is similar problem to this UDN reported bug. https://udn.unrealengine.com/questions/438893/view.html It can be avoided by removing the comments in LevelSeuqnceActorSpawner.cpp UEng ...
ObjectPivotPoint does not work with instanced Nanite meshes
UE - Rendering - Architecture - Materials - Nov 17, 2022Regression: Nanite Foliage is a new feature in 5.1, so this issue is not reproduceable in 5.0. Notes about this new support can be found under Nanite Improvements in https://docs.unrealengine.com/5. ...
Niagara Sim Cache result from 3D Gas is blocky in Windows packaged game
UE - Niagara - Sep 13, 2024Summary: Cached 3DGas Niagara system appears blocky in packaged game. Brought up by a licensee via UDN: https://udn.unrealengine.com/s/question/0D5QP00000a17A40AI/niagara-fluids-simcache-artefacts- ...
Search field in 'Quickly Add to Project' fails with Chinese Pinyin input unless manually focused
UE - Editor - UI Systems - Localization - May 28, 2025A licensee reported that under the Chinese language setting in UE5, using the “Quickly Add to Project” button results in incorrect or ignored input when entering text via Pinyin IME. If the user sta ...
Actor being moved via sequencer has inherited velocity that ignores play rate scale
UE - Anim - Sequencer - Nov 8, 2019When an actor that can be stood on and jumped off of is moved in a sequencer it's inherited velocity doesn't scale with the Sequence play rate. If you jump in the opposite direction the cube is goin ...
Crash when using both tessellation and virtual texture on a landscape material
UE - LD & Modeling - Terrain - Landscape - Feb 11, 2020When a landscape is set up to use runtime virtual texturing. If it uses a material that writes to a runtime virtual texture and has tessellation enabled. Then we see a crash and the log reports: ...