Unreal Engine Issues
Unreal Engine Issues
Creating a function with parameter type TEnumAsByte<MyEnum> will crash while compiling
UE - Editor - Workflow Systems - Jan 11, 2022This is a regression.This does not affect UE5. Creating a function with parameter type TEnumAsByte<MyEnum> will crash while compiling. In 4.26 and UE5 the code compiles without issue, and the user ...
UHT needs to enforce that BlueprintNativeEvents have "virtual" on user-defined _Implementation functions
UE - Foundation - Core - Mar 3, 2015Forgetting to add the "virtual" in engine code implementations of these _Implementation functions makes them not overridable by users. UHT should catch this and emit a warning/error. For instance t ...
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 ...