Unreal Engine Issues
Unreal Engine Issues
Niagara system loses source emitters when moving Engine from 4.22 or earlier to 4.23 or later.
UE - Niagara - Nov 29, 2019The following code causes this behavior.// NiagaraSystem.cpp for (FNiagaraEmitterHandle& EmitterHandle : EmitterHandles) { EmitterHandle.ConditionalPostLoad(NiagaraVer); if (!EmitterHandl ...
Problems in skeletal mesh merge
UE - Editor - Content Pipeline - Asset Build - May 10, 2021There are a few issues a licensee has found with the skeletal mesh merge operation. See the UDN for more details and the proposed fixes. Note, the issue with the cloth merge is already logged in a ...
bIgnoreAllPressedKeysUntilRelease only applies to keys in the previous mapping
UE - Gameplay - Input - Jun 16, 2022This is because the RebuildControlMappings function only checks this flag when you have a mapping that was already added, we should apply this for any new mappings as well. I'll update the repro s ...
Disabling bLerpUVs in Nanite Settings of Static Mesh causes texture warping in clusters
UE - Graphics Features - Nanite - Jan 21, 2025The licensee has identified a potential fix by changing if( Settings.bLerpUVs ) to if( Settings.bLerpUVs || UVIndex == 0 ) On line 389 of NaniteBuilder\Private\Cluster.cpp in UE 5.5 ...
Crash when DFAO is disabled and a lower scalability is used while Distance Field Shadowing is enabled.
UE - Graphics Features - Feb 2, 2016When enabling Distance Fields for a project and adjusting the cvars to disable DFAO and set a lower Detail Mode will result in a crash. Using the console commands outlined in the steps will work. ...
Crash When Raycasting Against Mesh With Multiple Materials
UE - Simulation - Physics - Feb 26, 2016When using a raycast trace against a blueprint that has a child component with multiple materials will cause the editor to crash after a few times. This will not be an instant crash, but requires th ...
Calling LoadAssetDataFromPath with default save path crashes the editor
UE - Foundation - Core - Nov 20, 2015Attempting to call LoadAssetDataFromPath with the path set to the default save location (/Saved/SaveGames) ...
Converting Int to Byte to Enum crashes editor during PIE
UE - Gameplay - Blueprint - Jan 28, 2016Converting Int to Byte to Enum crashes editor during PIE. Frequency: 3/3 Crashreporter: N/A ...
TUnion copy constructor causes the editor to assert due to Unrecognized TUnion subtype
UE - Foundation - Core - Mar 15, 2016The TUnion copy constructor causes the editor to toss an assert due to it claiming that the passed in TUnion is of an Unrecognized TUnion subtype. ...
Adding specific map to project crashes editor
UE - Gameplay - Dec 23, 2015Adding map from user's project, CityofEther.umap, crashes editor upon launch or attempting to open the map. Crashreporter: [Link Removed] ...