Unreal Engine Issues
Unreal Engine Issues
Array index out of range with StopTree
UE - AI - Mar 26, 2019Crashes when exiting PIE while executing multiple async tasks. By explicitly executing EndTask and FinishAbort of RecieveAbort, this caused by performing out-of-range in array access to InstanceStac ...
Virtual Texture Data GetNumMips reports one fewer mip than expected
UE - Graphics Features - Feb 27, 2025FVirtualTextureBuiltData::GetNumMips() can return 1 fewer mip than it should due to a potential clamping issue at the end of FVirtualTextureBuilderDerivedInfo::InitializeFromBuildSettings() where it ...
D3D Device Lost 'HUNG' crash in FD3D11Viewport::PresentChecked
UE - Graphics Features - Oct 31, 2016This is a new D3D crash affecting multiple users in 4.14 Preview 1. It is currently the #1 crash in the Preview. Information provided by users:Just pressed create project...Openning QA Game with - ...
Skel/Vert/Surf Module is spawning sprites at emitter origin
UE - Graphics Features - Nov 7, 2014Even after assigning associated bones and mesh to the module, the emitter is spawning a number of sprites at the emitter origin. See Picture Attached This may be related to an earlier reported iss ...
Cannot open Anim Notify Manager
OLD - Anim - Jan 3, 2017Cannot open Anim Notify Manager. Right Click>Manage Notifies doesn't open it and the Manager no longer appears in the Window Menu. Regression: YES Broken: 3224400 (4.14.1) Worked: 3172292 (4. ...
Fbx Importer: Make sure the blendshape curve keys have the correct tangent scale
UE - Anim - Oct 4, 2021The tangent of the blendshape curve seam to have the wrong scale (but correct direction) from this UDN. https://udn.unrealengine.com/s/question/0D54z000079J03OCAS/skip-compressing-anims-and-buildin ...
Rendering out PNG Sequence from Matinee yields Transparent PNGs
Tools - Mar 30, 2015When rendering a movie out as a PNG sequence, the PNGs are all rendered with Transparency and require the addition of a Black layer before the frame can be viewed as in the Matinee. Went back and t ...
Media Player not updating when IMG Media Source files are changed
Media Framework - Aug 20, 2020Images in a sequence path for an Img Media Source are not updating without restarting the project. Changing the path itself appears to work as expected. Tested in versions 4.22.3(CL 7053642), 4. ...
Early Z-Pass no longer works
UE - Graphics Features - Jun 11, 2019Since 4.22.2, the Early Z-pass flags are being ignored, resulting in the number of draw calls to increase. Tested in 4.21.2 (CL - 4753647), 4.22.2 (CL - 6574378), 4.23 (CL - 6925347) ...
Double-Clicking a Camera in the World Outliner Changes Its Position
Tools - Sep 29, 2015When you double-click on a camera in the world outliner to snap to its location, it instead moves the camera from its original position. Found in 4.9.1 binary. Could not reproduce in 4.8.3, this i ...