Unreal Engine Issues
Unreal Engine Issues
NaN Present on IOS after UE5.6 Because of Removal of MobileSpecularGGX
UE - Platform - Mobile - Sep 24, 2025In UE5.6 MobileSpecularGGX was removed and now mobile devices also run D_GGX. The problem is that there are still cases where very bright values are produced (image 1) and thus NaNs appear in the Bl ...
Setting world scale appears to affect the distance between eyes in VR
UE - Platform - XR - Nov 21, 2016The "Set world to meters scale" node appears to affect the distance between eyes in VR. The eye gap distance appears to grow larger as well making everything appear out of focus ...
Play rate affects all blendspace samples using the same Anim Sequence
OLD - Anim - Jun 27, 2017Play rate affects all blendspace samples using the same Anim Sequence Occurs on? 4.15 - 3450819 - YES 4.16 - 3466753 - YES 4.17 - 3502710 - YES ...
Post Process Volume Priority Doesn't Affect Post Process Materials
UE - Graphics Features - Sep 17, 2018Post process volume priority doesn't affect post process materials. Found in 4.19 CL# 4033788, 4.20 CL# 4302132, and 4.21 CL# 4369303 ...
When using Lighting Scenario, loading order will affect how it's applied to the instances
UE - World Creation - Worldbuilding Tools - Foliage - Mar 7, 2019When using Lighting Scenario, loading order will affect how it's applied to the instances, resulting in corruption if content is loaded after the lighting scenario ...
Fix BinkMediaTextureResource command list crash on UE 5.6
RAD - May 23, 2025Bink MediaTextureResource assets cause a graphics API crash, due to a missing UAV flag. The Licensee has proposed a fix to add the TexCreate_UAV flag. ...
Vehicle Template Gears incorrectly affect gear shift speed
UE - Gameplay - Feb 8, 2016Changing the Up Ratio of a vehicle movement component incorrectly alters gear shifting. For example, setting the ratio for Gear 3 to 1.0 will keep the vehicle from shifting to gear 2, etc. ...
Creating a BSP modifies the default brush, adversely affecting placement of Volumes
UE - LD & Modeling - Modeling Tools - BSP - Aug 12, 2016When a new BSP is created, modifications are made to the level's default brush. These changes affect how volumes are placed, with different BSPs causing different behavior in volume placement. ...
Specular Isn't Affected for Materials Set to the Eye Shader If r.IrisNormal is Enabled
UE - Graphics Features - Aug 27, 2019Specular Doesn't Affect a Material with the Eye Shader If r.IrisNormal is enabled. Found in 4.22 CL# 7053642, 4.23 CL# 8115738, 4.24 CL# 8302014 ...
image size does not appear to have any affect when a progress bar's image is set to tile
UE - Editor - UI Systems - Slate - Jun 15, 2015When trying to set the image size for the image that is tiled in a progress bar, this does not appear to have any affect. The expected result would be for it to modify the size of the image so as to ...