Unreal Engine Issues
Unreal Engine Issues
Material Instance values lost when using Material Parameters inside of multiple Material Functions
UE - Rendering Architecture - Materials - Mar 30, 2018Material Instance parameters (that derive from parents using material functions) can have their data shifted or not saved. ...
AI Controller Possess Function Called When Opening a Character Blueprint with AutoPossessAI Set to Spawned
UE - AI - Apr 11, 2017AI Controllers' Possess function is being called when opening a blueprint that has the Auto Possess AI option set to Spawned. ...
Recent change to Material Expression code missing a case for "exp2" function in switch (cpp)
UE - Editor - Content Pipeline - Datasmith - Mar 4, 2024The function "FMaterialDerivativeAutogen::GetFunc1ReturnType(...)" does not have a case for "EFunc1::Exp2". Also found in Release-5.4, CL: 331987674 ...
Thin Translucent materials opaque with FS lighting mode and Output velocities active
UE - Rendering Architecture - Materials - Nov 15, 2021Im not 100% sure this is a combination of settings that "should" work anyway, but need someone to have a look.Thin TranslucencyOutput velocities during base passForward Shading lighting modeProject ...
Rect light LTC textures fail to load when cooking with bSharedLinearTextureEncoding enabled
UE - Texture - Apr 2, 2025When running a build with bSharedLinearTextureEncoding enabled, View.GGXLTCMatTexture and View.GGXLTCAmpTexture are pointing at the black texture fallback, which affects correctness of rect lighting ...
Forward Rendering Stationary Light Artifact
UE - Graphics Features - May 11, 2018The user who reported the issue has provided a video that also shows the issue: [Link Removed] ...
DumpShaderAsm function fails to load compiler DLL and does not output disassemble code
UE - Rendering Architecture - May 24, 2023This is a path specification problem, so if the correct path is given, the DLL will load correctly.static void DumpShaderAsm(FString& String, const D3D12_SHADER_BYTECODE& Shader) { #if D3D12RHI_US ...
Base materials in exported Datasmith files imported into Unreal Engine are missing material function.
TM - Interoperability - Nov 19, 2024Datasmith imports in UE do not render materials due to missing material function. Works in UE 5.6 main but not UE 5.5 or 5.4 ...
Functions containing Unicode characters break nativization on Clang-hosted target platforms.
UE - Gameplay - Blueprint - Sep 15, 2020The UHT boilerplate code that's generated from a converted Blueprint class header file generated from a Blueprint class containing one or more function names with non-ASCII characters will fail to c ...
Duplicating an overridden function graph causes input/output pins to double
UE - Gameplay - Blueprint Editor - Aug 16, 2019This is caused by the same thing that causes this: https://jira.it.epicgames.net/browse/UE-58390 FBlueprintEditorUtils::PromoteGraphFromInterfaceOverride is the cause of this behavior ...