Unreal Engine Issues
Unreal Engine Issues
Frustum Culled Landscape Components Not Casting Shadows
UE - Graphics Features - Mar 5, 2019Frustum culled landscape components stop casting shadows resulting in the shadows disappearing near the edges of the camera in square sections. Unable to test in 4.20 or 4.21 as provided project wa ...
Actor to Track gets broken on Sequence saving when a keyframe is added
UE - Anim - Sequencer - Apr 2, 2019When using Actor to Lookat and adding a keyframe to the track, the references are lost to the selected Actor when saving the Sequence. This prevents the Sequence from being saved and generates a few ...
Massive FPS drops in editor when moving mouse over menu items on Linux
UE - Platform - Linux - Apr 22, 2019Navigating various dropdown menus in the Editor causes the FPS to drop down to around 25 or 10 in the Viewport on an empty project. This does not reproduce on Windows with -vulkan This issues was ...
DirectX Tesselation Crash
UE - Graphics Features - Dec 12, 2017Per UDN Licensee: I have 2 crash repro when enabling DirectX12, both linked to tesselation and still present in 4.18 stock engine and easy to reproduce. Crash 1 -Start editor with DirectX12 -Cre ...
Child Blueprint components become broken in sequencer when "Run Construction Script in Sequencer" is checked
UE - Anim - Sequencer - Oct 15, 2019When enabling "Run Construction Script in Sequencer" on a Blueprint Child Actor and having "Rerun Construction Scripts" turned on in Sequencer, the Child BP's properties become inaccessible in Seque ...
Landscape Spline Width/Side Falloff does not respect Unreal Units.
UE - LD & Modeling - Terrain - Landscape - Nov 15, 2019The user reports that the Landscape Spline Width and Side Falloff isn't respecting Unreal Units in the Editor. The usage for comparison is a Cube that is scaled up 7x to Splines that have a Width of ...
Blueprint Editor Show Grid does not toggle the grid in the viewport
UE - Editor - Workflow Systems - Oct 28, 2020The grid in the blueprint editor is not able to be hidden via the Show Grid flag in the viewport dropdown. This has regressed sometime in //Ue4/Release-4.25 as I cannot reproduce this issue in //UE4 ...
3D Grass may not appear in Path Tracer renders
TM - Rendering - Sep 19, 2025Reported in SF [Link Removed] Path Tracer renders of images with 3D grass may not display 3D grass in the foreground of an image. The 3D grass material will not appear or may appear to cut off at s ...
The ChaosCacheManager changes the bSimulatePhysics flag from the ObservedComponents and, if deleted, the change will persist, what can lead to confusion as observed physical entities will inadvertently stop simulating physics
UE - Simulation - Physics - Nov 26, 2024The ChaosCacheManager (CCM) changes the bSimulatePhysics flag from the ObservedComponents and, if deleted, the change will persist, what can lead to confusion as observed physical entities will inad ...
Crash in FLandscapeRenderSystem on Mobile
UE - Graphics Tools - Terrain - Landscape - Aug 4, 2021Similar issues have already been reported here for iOS [https://udn.unrealengine.com/s/question/0D52L00004vJelTSAS/crash-ios-in-flandscaperendersystemcomputesectionperviewparameters] and here [https ...