Unreal Engine Issues
Unreal Engine Issues
APT copies only one CSV from GauntletTemp even if multiple perf sequences are run
UE - Platform - APT - Oct 8, 2025Reported by a licensee - separate CSVs from different perf sequences that are in one go are not picked up upon completion. ...
Missing DirectX redist on clean machine
UE - Foundation - Core - Apr 10, 2017Running a packaged UE4 game with app-local dependencies on a clean Windows machine will fail due to missing XInput DLLs. These components are not distributed with Windows by default any more. We sho ...
Vertex Interpolate Node Doesn't Work with Lightmass
UE - Graphics Features - Lumen - Aug 8, 2018The vertex interpolate node doesn't work with lightmass. Found in 4.19 CL# 4033788, 4.20 CL# 4233996, and 4.21 CL# 4258917 ...
Contact Offset no longer appears to have an effect
UE - Simulation - Physics - Jan 15, 2019When modifying the contact offset in a project it appears to have no effect. The setting that worked in a previous engine version (4.19) now collide in the same way as the default settings. ...
bStaticWhenNotMoveable in Lighting category instead of Physics
UE - Simulation - Gameplay - 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 ...
PIE after the Game Instance's parent has a wire disconnected, compiled, then reconnected crashes this project
UE - Gameplay - Blueprint - Sep 18, 2015This user's project crashes on PIE after the Game Instance's parent has a wire disconnected, compiled, then reconnected. Possibly related to [Link Removed], but the call stack is slightly different. ...
Toggling Vertex Colors on in Static Mesh Editor makes the viewport all white
UE - Gameplay - Aug 4, 2016When 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, 2016Reported via UDN ...
Clearcoat shader disappears if any asset using the Material leaves lighting
UE - Graphics Features - Aug 19, 2015Clearcoat 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, 2016It 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 ...