Unreal Engine Issues
Unreal Engine Issues
Depth reading features on devices without framebuffer fetch are relying on undefined behaviour.
UE - Platform - Mobile - Oct 26, 2016For devices without framebuffer fetch we are relying on undefined behaviour for depth reading with decals, mod shadows and depth reading materials. (ES2 spec: 3.8.6 Texture Framebuffer Attachment). ...
DOF effect set with negative near transition region causes Massive FPS loss moving into Focal Region
UE - Graphics Features - Feb 11, 2016With a Bokeh DOF setup that essentially places the Near Transition Region into a Negative Space (or non-existence) the FPS drops dramatically from out of focus region to in focus region. In Focal R ...
Static Mesh Editor material element highlight does not highlight the element
Tools - Jul 18, 2016If the user selects "Highlight" for an element in the static mesh editor, the element is not highlighted. ...
UMG Calibri font space between characters changes depending on the onscreen size of the textbox containing it
UE - Editor - UI Systems - Jan 14, 2020Within a UMG Widget Blueprint. Calibri font space between characters changes depending on the onscreen size of the textbox widget containing it. ...
Using Show Mouse Cursor causes mouse to become detached from game window
UE - Editor - UI Systems - Slate - Aug 24, 2015Using the Show Mouse Cursor command (or BP node) will make the mouse appear in the game window however at that point the mouse does not interact with the game unless one of the mouse buttons is held ...
Foliage Culling is Broken on Linux
UE - Platform - Linux - Apr 25, 2018When viewing foliage on Linux it culls in and out as the camera comes closer to it. Also changing the way it is rendered to become grey and transparent (and changing back to normal, perhaps dependin ...
Crash opening FaceARSample on iOS
UE - Platform - XR - Jul 26, 2019FaceARSample is crashing as soon as it is opened on iOS. Tested on a iPhoneXS 12.4. Regression: Yes I was able to get FaceARSample on the same device the previous release 4.22. ...
Light Leaking With Raytraced Shadows On Lights With Non-Zero Source Length
UE - Graphics Features - Ray Tracing - Jul 23, 2024Light sources which have the source length attribute set to a value greater than zero seem to be leaking light through occluding geometry (see the image below and repro project). Moving it away from ...
CharacterMovement doesn't clear velocity
UE - Simulation - Physics - Oct 11, 2024Velocities are not being cleared when physics simulation set to false. ...
Incorrect resolution used because SetProcessDpiAware() is not called when bAllowHighDPIInGameMode=False
UE - Rendering Architecture - Aug 8, 2025The incorrect resolution is used on computers with 4k monitors that use DPI scaling (default 150%) because the default for UE projects is bAllowHighDPIInGameMode=False which results in SetProcessDp ...