bStaticWhenNotMoveable in Lighting category instead of Physics

UE - Runtime - Character - Oct 24, 2025

"UPrimitiveComponent::bStaticWhenNotMoveable"'s category is set to Lighting, not Physics. This causes it to be hidden when lighting-related properties are hidden, even though it controls physics sta ...

Toggling Vertex Colors on in Static Mesh Editor makes the viewport all white

UE - Gameplay - Aug 4, 2016

When turning on the Vertex Color option in the static mesh editor, the whole viewport turns white. ...

Lighting channels are not supported with tiled lighting

UE - Graphics Features - Aug 15, 2016

Reported via UDN ...

Landscape Paint Layers will not scroll to the end when using mouse wheel

UE - LD & Modeling - Terrain - Landscape - Sep 28, 2020

In a normal detail panel, each element has its own SDetailSingleItemRow and are mostly uniformly sized with some exceptions of having a few bigger rows (i.e. asset pickers). However, these layers ar ...

Clearcoat shader disappears if any asset using the Material leaves lighting

UE - Graphics Features - Aug 19, 2015

Clearcoat Shader will stop receiving lighting information if any mesh assigned the material using the shader leaves lighting. Also Reproduced in Launcher 4.9 Preview 4, Main-CL-2660934 [Image Remo ...

OSVR does not consistently render to HMD if OSVR Server is not open prior to opening editor/cooked game

UE - Platform - XR - May 18, 2016

It seems like if OSVR_Server is not launched prior to opening the editor, vr-preview functionality will not work (even though the editor starts OSVR_Server at launch). Seems like server must be open ...

Long paths are not supported in NET 4.5

UE - Foundation - Cpp Tools - Aug 21, 2018

The editor has been modified to support long file names, but the packaging pipeline (which is written in C#) needs to be upgraded to NET 4.6.2 to enable this. Without enabling it, it crashes with a ...

Stop using power of 2 RTs for landscape edit layers

UE - Graphics Tools - Terrain - Landscape - Apr 4, 2023

Result : all the RTs allocated for edit layers (in global merge mode) will be padded to the next power of 2 for no good reason, which can lead to out-of-VRAM (as reported by [Link Removed]) ...

Crash on Importing specific Animation Only FBX

Tools - Nov 16, 2015

When importing the attached FBX file with only Animations, the editor will crash. The Same asset will import without error in 4.9.2 Crash Reporter BUGG: [Link Removed] ...