Unreal Engine Issues
Unreal Engine Issues
Landscape Layer Blend generates bad code for preview shader
UE - LD & Modeling - Terrain - Landscape - Sep 23, 2019It breaks only when compiling the preview shader. Adding a preview weight to the Layer0 on the Layer Blend node fixes the problem. The source of the bug is in UMaterialExpressionLandscapeLayerBlend ...
Cash when entering Path Tracing view mode if r.Decal.NormalReprojectionEnabled true
UE - Graphics Features - Path Tracer - May 16, 2025Cash when entering Path Tracing view mode if r.Decal.NormalReprojectionEnabled true The licensee has reported: This crash happens because the DeferredShadingRenderer tries to extract the normal GBu ...
DataTable::LoadStructData allocating wrong size
UE - Foundation - Core - Oct 5, 2016Pointed out by a licensee here: UDataTableを読みこんだ際のメモリ破壊について When reading the `UDataTable, in DataTable::LoadStructData()` the contents of the struct are interpreted[Image Removed], but the size of ...
UDN : Mutable Trying to Access Invalid UEdGraph Pointer
UE - Anim - Mutable - Mar 6, 2025Hello, We've started seeing a crash within Mutable when it tries to access the source graph in PIE. This only seems to be a problem when running a dedicated server as a separate process. We integra ...
Unresponsive black screen in standalone when enabling HMD w/ Oculus attached
UE - Platform - XR - Oct 8, 2015Going fullscreen/stereo on/enableHMD causes a play in standalone to go unresponsive and render as a black screen. Found on: Binary 4.9.2 release (from launcher/portal) UDN: https://udn.unrealengin ...
Characters with disabled Net Load on Client are loaded twice on a Standalone Client
UE - Networking - Jun 16, 2015Characters with disabled Net Load on Client are loaded twice on a Standalone Client. This does not occur on the Server. This only occurs in Standalone, not in PIE nor in packaged games. Reproduced ...
Properties missing from Japanese UI
UE - Editor - UI Systems - Localization - Oct 20, 2015Some properties go missing when the Editor is switched to Japanese mode. Specifically, missing under Collison: -Simulation Generates Hit Events -Phys Material Override -Use CCD (See attached screens ...
Particle Cutout Will Clip Texture On Certain Frames Even With Alpha Threshold of 0.0001
UE - Niagara - Feb 17, 2017A licensee has reported that the particle cutout feature will sometimes clip the image on some frames despite having an alpha threshold of 0.0001 The attached project has an example of this on the ...
Child Actor Component Not Destroyed When Parent BP Is Replaced in Scene
UE - Gameplay - Blueprint - Oct 16, 2015Having an actor in the level with a child actor component, replacing it with another copy of itself, and deleting the copy results in a Child Actor remaining in the world outliner, which cannot be d ...
Surface Profile Skin shading has some unexpected stripe rendering issues
UE - Graphics Features - Apr 3, 2018So it looks like the artifact is definitely related to whether sss checkboard is enabled, but I can't reproduce it if enabling checkboard right after open the map, I mean it has to be reproduced aft ...