Unreal Engine Issues
Unreal Engine Issues
Blendspace Animation Lag for Morph Targets
OLD - Anim - Sep 11, 2015Blendspace animations of morph targets play at a slightly but noticably different rate between the 4.8 and 4.9 version of the UE4. ...
Spot Lights are not using Light Propagation Volumes when enabled
UE - Graphics Features - May 23, 2016As of 4.9 Dynamic Indirect Lighting with Light Propagation Volumes should be supported for Spot Lights. This does not appear to be the case for several versions that I could see. Using the methods o ...
Clicking the [Absolute] bottom of Buttons in Toolbar does not Function
Tools - Sep 9, 2015Hovering over the absolute bottom of buttons in the toolbar, particularly in Blueprints, results in the button being highlighted, but not accessable. The area seems to be 1 or 2 pixels from the bot ...
Slight delay when switching between UMG buttons on Mac
UE - Editor - UI Systems - Dec 30, 2014There is a slight delay when clicking between two different UMG buttons on Mac. Tested on OSX 10.10.1. There also appears to be a flicker on the Menu Bar. ...
Server doesn't process anim notifies with montage tick type set to queued when bad network conditions occur
UE - Anim - Gameplay - May 3, 2023After some testing this issue looks to only occur with queued notifies and not with branching point notifies. UDN: https://udn.unrealengine.com/s/question/0D54z00009643x4CAA/server-doesnt-process-a ...
RenderTarget Texture Alpha rendered incorrectly when SceneCapture2D AA set to true
UE - Graphics Features - Jan 8, 2016The Alpha Channel of the Render Target Texture is rendered as a value of 1 (solid white) when the SceneCapture2D actor is set to LDR with PP and Anti-Aliasing is set to true in the General Show Flag ...
Modulated shadows do not render in the correct area on older devices / versions of Android OS
UE - Platform - Mobile - Apr 5, 2016This issue was reported by a user who was having issues with their modulated shadows showing up in random spots on their mobile devices. Their devices were a Samsung Galaxy Note 2 and a ASUS Zenfon ...
Crash with FBX with LODs when distance fields and Generated Lightmaps are enabled
UE - Graphics Features - Jan 12, 2015DESCRIPTION: When importing a mesh with 1 or more additional LODs when Generate Mesh Distance Fields has been enabled via the Project settings will cause a crash if the import options include using ...
Crash trying to convert skeletal mesh to Nanite
UE - Graphics Features - Nanite - Mar 6, 2025In SkeletalRenderNanite.cpp / FDynamicSkelMeshObjectDataNanite::UpdateBonesRemovedByLOD, bone indices are of type FBoneIndexType (defined as uint16 from BoneIndices.h), instead of int32. On line 18 ...
Insufficient precision of Decode71 function
UE - Rendering Architecture - Shaders - Jun 5, 2025Encode71 and Decode71 in DeferredShadingCommon.ush are functions that convert 8-bit values to 7-bit values and mask values, and licensees have reported that the accuracy is insufficient when usi ...