InstancedStaticMesh displaying corrupt lightmap data

UE - Rendering - May 17, 2021

I think I narrowed this issue down to bad UV coordinates being interpreted during the BasePassVertexShader execution applied to instancing. At this line in VertexFactoryGetInterpolantsVSToPS: flo ...

iOS/TVos/Mac Compilation Error - Argument List Too Long

UE - Platform - Mobile - Oct 8, 2020

Compilations are failing on iOS, tvOS and Mac due to the following clang error: clang: error: unable to exectute command: posix_spawn failed: Argument list too long ...

Multiplayer Preview in VR HMD input routed to all players

UE - Platform - XR - Sep 1, 2020

Multiplayer Preview in VR is not useful because HMD input is routed to all players. ...

Changing Texture Parameter via SetMateriaInstanceTextureValue remain old texture's reference

UE - Rendering - Mar 13, 2020

When editing the texture parameter of Material Isntacne using Editor Utility Widget, the old texture is linked with the SoftReference. When change the texture parameter in Material Instance Editor, ...

Renaming a component in a parent blueprint can lead to data loss in its unloaded child blueprint.

UE - Gameplay - Blueprint - Jan 20, 2020

A child blueprint won't be marked dirty if it hasn't been loaded and you rename a component on its parent blueprint. This can lead to a situation where the editor can be closed without prompting the ...

Hide Bone in constructor does not update world instances

UE - Anim - Runtime - Nov 4, 2019

Hiding bones during construction is not properly displayed by level instances placed at editor time. Note that setting 'Update animation in editor' on the mesh and re-running the constructor script ...

Shared Transitions are not usable by separate state machines within the same ABP

UE - Anim - Runtime - Anim Blueprints - Oct 18, 2019

Shared transition rules/crossfades are not usable by other state machines within the same ABP. Copy/Pasting these transitions to a new machine, create new independent shared transitions of the same ...

LODbias settings appear to have no effect when specified by GPU on android

UE - Platform - Mobile - Oct 3, 2019

When setting the LODbias via the device profile for a specific Android GPU it does not appear to have an affect on the textures when run on the device ...