Unreal Engine Issues
Unreal Engine Issues
ES2 Fallback Fails on Nougat Devices that do not support Vulkan
UE - Platform - Mobile - Aug 28, 2016Discovered this while doing RC candidate testing for 4.13 Works fine in all other use cases: Nougat devices that support Vulkan Marshmallow devices that support Vulkan Marshmallow devices that don' ...
Low res textures (MobileContentScaleFactor) on iPad Pro 10.5"
UE - Platform - Mobile - Jul 31, 2017There's no device profile to set MobileContentScaleFactor for iPadPro 10.5". It picks up other rendering settings properly from the iPadPro family, but this doesn't set MobileContentScaleFactor. T ...
Volumetric Light Fog Leak through objects
UE - Graphics Features - Dec 31, 2018Any environment with volumetric fog enabled will have a light leak which appears through objects. Found in 4.20 CL# 4369336, 4.21 CL# 4613538, 4.22 CL# 4666322 ...
The "Meshes" value of the LLM for dx11 is considerably larger than that for dx12.
UE - Graphics Features - May 9, 2022We hope that the difference in GraphicsRHI will not cause such a big difference, but we need to make sure that there are no measurement omissions in the case of DX12. ...
Sequencer auto-generated thumbnails should not replace manually-catpured thumbnails.
UE - Anim - Sequencer - Jun 17, 2025APT copies only one CSV from GauntletTemp even if multiple perf sequences are run
zComponent - Archive - 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 - 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 ...