Manually importing LODs are rotated 90 degrees when using Transform Vertex to Absolute

Tools - May 26, 2016

When importing a Static Mesh if you use the default settings and then manually import any LODs for that static mesh they will be rotated by 90 degrees. I found that disabling Transform Vertex to A ...

Chaos : Rigid body sleeps when very small external force is applied by AddForce

UE - Simulation - Physics - Solver - May 25, 2022

When a small external force is applied to the rigid body, the VSmooth value is reset in the ResetVSmoothFromForces function. Since this function ignores the current velocity, a very small velocity ...

Planar Reflections do not respect SkyLight intensity

UE - Graphics Features - Nov 14, 2017

Planar Reflection actor does not reflect the intensity change of the SkyLight. In attached images, the Intensity of the SkyLight is set to 2. The darker area on the right is affected by the Plana ...

Lightmass Build Hanging at Specific Percentages

UE - Graphics Features - Sep 4, 2015

Lighting will build indefinitely in certain circumstances and can be verified in Swarm Agent that it will continue to process the maps even though the log shows it has completed. This is happening i ...

Lightmass Build Hanging at Specific Percentages

UE - Graphics Features - Sep 11, 2015

Lighting will build indefinitely in certain circumstances and can be verified in Swarm Agent that it will continue to process the maps even though the log shows it has completed. This is happening i ...

Copy-pasting (in the details panel) an array of structs containing multiline text not coming back entirely correctly

UE - Editor - UI Systems - Slate - Dec 20, 2016

This is the copy buffer (it contains multiline strings): ((SectionName_10_AD815C6B40E1AA91C8FB72B006CB648A="TeamScreen_Overview",TipHeader_8_0A891281438C7AD03199038A729ACC18="Heroes",TipBody_9_C20B ...

Incorrect mesh deformation when Max World Position Offset Displacement used

UE - Graphics Features - Nanite - Feb 12, 2025

When Vertex Animated Texture is used to animate a mesh with World Position Offset, often the Max World Position Offset Displacement Material setting must be increased or the Bounds Scale increased, ...

A 5.5 level that contains a Text3DComponent in a BP crashes the engine when opened in 5.6 (and up)

UE - Virtual Production - Sep 11, 2025

A 5.5 level that contains a Text3DComponent in a BP crashes the engine when opened in 5.6 (and up). The licensee has provided his analysis: Description: Level instance created in UE5.5 and re-saved ...

Collision Responses will reset to previous setting after changing the Preset Collision Profile

OLD - Anim - Mar 1, 2017

Collision Responses will reset to previous setting after changing the Preset Collision Profile. After the change is made and "Accept" is pressed, the Collision Responses will still have the old ch ...

Modules with Emitter Life functioning incorrectly

UE - Graphics Features - Jan 7, 2016

Setting the Emitter Time module with an emitter that is not set to loop will result in an incorrect render of the particles past the emitter duration. Emitter Duration set to 3 seconds:[Image Remov ...