Unreal Engine Issues
Unreal Engine Issues
The AND node always calculates all inputs
UE - Gameplay - Blueprint - Nov 5, 2015The AND node always calculates all inputs, even if the first input fails as False. Probably related to [Link Removed] (currently unresolved, but a Select node-specific fix is mentioned in the comme ...
Physics Constraint Actor: When plasticity is enabled, Drive Position Target is reset to zero on constraint initialization
UE - Runtime - Simulation - Mar 5, 2026When a Chaos joint constraint is first created, having linear/angular plasticity enabled will unexpectedly force its linear/angular drive position target to zero on initialization, disregarding the ...
Lighting data wiped if sub level is hidden while rebuilding lighting for visible levels
UE - Graphics Features - Jan 11, 2017When building lighting now you can no longer have a hidden sub level and have it retain it's built light if it was previously built. For instance, if you have a persistent level and hide the sub-lev ...
Compile button disappears and Hot Reload stops working after failing to Hot Reload in some cases
UE - Foundation - Core - Jun 2, 2016When failing to hot reload in some cases, the compile button in the editor will disappear and Hot Reloads will stop occurring. This tends to happen randomly in other scenarios but the method above i ...
Changing BlueprintCallable function's code results in Warning in blueprint that should be considered an Error
UE - Gameplay - Blueprint - May 3, 2016A user reported an issue where, if a BlueprintCallable function's parameters are edited, a blueprint using a BlueprintCallable function will give warnings instead of an error for a problem after the ...
LIVE: Manually importing a single LOD created in Maya will rotate -90 degrees
UE - Editor - Content Pipeline - Import and Export - Nov 5, 2014DESCRIPTION: When importing a mesh created with Maya then saving, closing, and reopening the editor, if you add a LOD via the right mouse menu or mesh editor will result in the LOD importing -90 rot ...
Fog Does Not Behave As Expected in Splitscreen
UE - Graphics Features - May 25, 2018This bug seems to repro very inconsistently for me, but I've seen it affect Atmospheric Fog and Exponential Height Fog, and reproduced in 4.18.3, 4.19.2, and Main CL 4093338. I've attached Config fi ...
The Get node for the float value of Custom Axis Mappings only return 0.0 when called from Blueprints other than the Controller
UE - Gameplay - Input - Dec 3, 2014The Get node for the float value of Custom Axis Mappings only returns 0.0 when called from Blueprints other than the Controller. Input from the player does not affect the value. Note: this works a ...
Compile failure adding C++ Vehicle or VehicleAdvanced pack to a project
UE - Gameplay - Jan 11, 2017Adding the C++ Vehicle feature pack to a project fails to compile with the following error:CompilerResultsLog: Info Error: Couldn't find parent type for 'TP_VehiclePawn' named 'AWheeledVehicle' in c ...
Character Movement values do not reset to defaults
Tools - Mar 9, 2015Character Movement values do not reset to defaults. Changing a value and then using the arrow to Reset to Default updates the number displayed in the Details panel, but the value does not update dur ...