Unreal Engine Issues
Unreal Engine Issues
Most GameMode classes cannot be set in Blueprints
UE - Gameplay - Jun 14, 2015Most GameMode classes cannot be set in Blueprints. Only Set Default Pawn Class and Set HUD Class have Setters available in Blueprints (the Getters are all still available). Reproduced in 4.8.0 and ...
"Combine Meshes" Breaks Material Slot Assignment
Tools - Jan 18, 2017When importing an FBX with several different meshes and multiple materials with "Combine Meshes" enabled the materials will get assigned to incorrect portions of the mesh. I've included a version o ...
The Child Actor Component cannot be selected in the Blueprint Editor Viewport
UE - Gameplay - Jun 8, 2015The Child Actor Component cannot be selected in the Blueprint Editor Viewport. Selecting the Child Actor Component in the Components tab is the only way to select the component. Reproduced in 4.7.6 ...
Crash after network disconnection/pulling network cable
UE - Networking - Jul 11, 2019A very unfortunate bug shipped in 4.22 that causes a crash in many cases when a client is disconnected from the network, such as when unplugging the network cable. This will be a cert failure on con ...
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 ...
When changing the size of detail panel for animation state in Animation Blueprint diff tool, GetSelectedProfileName will occur crash
OLD - Anim - Jun 24, 2020When trying to display BlendProfile property in Animation Blueprint diff tool, it will occur crash, because EditableSkeleton is null in SBlendProfilePicker::GetSelectedProfileName(). So, a followin ...
Local Vector variables in functions do not save the Y and Z values
UE - Gameplay - Blueprint - Mar 12, 2015Local Vector variables in functions do not save the Y and Z values. Possibly connected: after entering the X value, pressing Tab does not move to the Y value. Tabbing from there works as expected. ...
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 ...
Canvas Render Target 2D doesn't get alpha mask when rendering with ES3.1
UE - Platform - Mobile - Apr 23, 2020The Alpha Mask on a Canvas Render Target 2D no longer appears when rendering with ES3.1. This is a regression from 4.24.3 (CL-11590370). This was reported and tested in 4.25 Preview 7 (CL-12759524) ...