Unreal Engine Issues
Unreal Engine Issues
Lightmap Coordinate Index is not automatically set to 1 on import any longer with lightmap UV
UE - Editor - Content Pipeline - Import and Export - Sep 6, 2016When importing a static mesh with a second UV channel setup for the lightmap the second UV is no longer being automatically assigned as the lightmap coordinate index. In 4.12 the second UV detected ...
Landscape holes retain collision if Mip level changed to 1
UE - LD & Modeling - Terrain - Landscape - May 19, 2015Landscape holes have collision if the mip level of the landscape is changed from 0 to 1. ...
Retopologized landscapes ignore collision when mip level set to 1
UE - LD & Modeling - Terrain - Landscape - May 14, 2015Object collision ignores landscape components that have been retopologized if the landscapes collision mip level is set to 1 instead of 0. ...
Draw Line in HUD does not respect alpha < 1.0
UE - Gameplay - May 2, 2016Draw Line in HUD does not respect alpha < 1.0, instead drawing completely opaque in all circumstances. Regression (No) issue (does) occur in 4.10.4 ...
Landscape displaces after converting file to Twinmotion 2026.1
TM - Core - Apr 23, 2026Reported in SF [Link Removed] The client has a file from Twinmotion 2025.2 that contains a sculpted landscape. When converting the file to Twinmotion 2026.1, the landscape becomes displaced from it ...
Character Movement Mode in Water Volume is affecting all clients
UE - Gameplay - Player Movement - Dec 16, 2019Strange behavior concerning Character Movement Network Replication and a Water Physics Volume. Upon entering water volume, Character Movement mode is set to swimming, however if more than one clien ...
Destructible meshes always affect navigation regardless of collision
UE - AI - Jan 27, 2016Turning off a destructible mesh's collision will still affect navigation around the destructible mesh Note: This issue is related to [Link Removed]. The workaround for that issue does not apply he ...
iOS Metal-based build crashes at launch with sub-levels.
Tools - May 16, 2016Application crashes when deploying a game to iOS with Metal enabled. This has only been reproduced if a sub-level has been added to the starting level within the project. This seems to only happen ...
Drag coefficient on vehicle blueprints affects forward and reverse differently
UE - Simulation - Physics - Mar 31, 2016Drag coefficient on vehicle blueprints affects forward and reverse differently. If in reverse, it seems to be additive or multiplicative to the vehicle's movement as opposed to providing any resista ...
Color Information Clamped to a Max of 1 in Cascade Color Modules
UE - Graphics Features - Dec 3, 2014You cannot enter a value higher than one in any color module. WORKAROUND - You can graph it and select the point you want to change and then set value to any number, but it will be clamped back to ...