Unreal Engine Issues
Unreal Engine Issues
Native interface events are not callable by default, which differs from native interface *function* implementations.
UE - Gameplay - Blueprint - Sep 11, 2015Since we implicitly create new function graphs for non-event functions when an interface is implemented, that code path marks the function as callable by default. In other words it's not required to ...
Disabling Shadow Denoiser causes raytraced shadows from Rect Lights to disappear
UE - Graphics Features - Lumen - Nov 6, 2020Disabling Shadow Denoiser causes raytraced shadows from Rect Lights to disappear ...
Converting a function with local variables to an event crashes editor
UE - Gameplay - Blueprint - Dec 9, 2020When converting a function with a local variable to an event, editor crashes. Issue does not occur in 4.25, therefore a regression. ...
Local Position Material Function failing to compile when Packaging for HTML5
UE - Platform - Mobile - Mar 25, 2016After some extensive testing, I could not find any reason why the material function LocalPosition node was failing to compile and defaulting to the world grid material when Packaging for HTML5. I a ...
Raytraced lights with Source Length > 0 behave incorrectly with Megalights
UE - Graphics Features - Ray Tracing - Mar 26, 2025When Megalights is enabled, light can leak into areas that should be occluded for lights with smallish (5.0) source length and source size. [Image Removed][Image Removed] This was taken with r.Ray ...
LIVE: RENDERING: Movable Mesh does not receive shadows from Static meshes in static or stationary lighting
UE - Graphics Features - Apr 30, 2014---------------------------------------------------------------------------------------------------------------------- Build: 4.1.0-2057451 Description: Movable meshes and blueprints set to cast n ...
Typo in Lighting Level for Min Roughness
Docs - Samples - Dec 29, 2014Within the "Lighting' level of the 'Content Examples' project, example 5.4 should say 'Min Roughness' instead of 'Source Radius' ...
A Function whose declaration is in a platform specific "If" block cannot be bound to a delegate
UE - Foundation - Core - Jun 3, 2016Functions whose definition is in a platform specific "if" block cannot be bound to a delegate and also causes an assert when beginning to play in PIE for the first time since compiling, but the asse ...
Moving a function to the parent class does not update the FunctionReference on calling nodes
UE - Framework - Blueprint Editor - Mar 19, 2021When SMyBlueprint::OnMoveToParent() gets called the callsites of the function are never updated in dependent blueprints. This results in any UK2Node_CallFunction's not having their `FunctionReferen ...
Play Media Player Node Causes Blueprint Functions to be Uncallable
UE - Gameplay - Blueprint - Feb 23, 2016This only occurs in standalone or a packaged game Having a Play Media Player node in a blueprint causes all of that blueprint's functions to become uncallable. Found in 4.11 Preview 5. Reproduced ...