Unreal Engine Issues

Custom Primitive Data color widget not applying correctly to static mesh components in Blueprint editor.

Context Custom Primitive Data is used to store custom data in an index array that is accessible through Blueprint and code. This allows for variations across instances of the same mesh without needi ...

Crash after adding an AI Perception component to a parent and child character

Crash after adding an AI Perception component to a parent and child character. First they both must have had AI Perception components > Compiled and saved > Then both AI Perception components delete ...

Reference to control rig can be lost on actors with multiple skeletal mesh components

In the attached project, when we initially add a control rig track for the actor with multiple skeletal mesh components, we add the control rig for the correct component because FControlRigParameter ...

Light Function and World Position in 5.4

When rendering a Light Function into the Translucency Lighting Volume, the World Position Material Expression returns the position relative to the Camera (unrotated), not the World. This can be mor ...

Scene Capture 2D will default back to View 0

The scene capture will revert back to the Character BP that is placed in the level when player 2 is not moving. When they are moving the scene captuer will show correctly. You can get around this ...

[CrashReport] Crash related to looped Reroute nodes

This is a common crash affecting users in 4.15 and 4.16. User DescriptionsI connected two reroute nodes together in a circle. And well it brought me here.I connected a reroute node with a reroutnod ...

Default value propagation of instance subobjects doesn't work consistently

Widgets will bind input delegates to the Player Controller's Input Component, but never unbind them

This is a bug introduced with 18468289 a while ago. We added this functionality for [Link Removed], which allows input event nodes to be placed within widgets and have them behave correctly.  This ...

Physics constraint component doesn't work when placed inside a child actor, while using world partition and streaming is enabled

Context: In a World partition level, to reduce complexity and provide a scalable solution when creating new projects, grid cell streaming can be enabled. Problem: The problem is that physics constr ...

HotReload fails with Linker errors when using Visual Studio 2017

I had a tester with VS 2015 run through the steps I failed with, and they were unable to repro. JamesF was able to repro the issue on VS 2017. JamesF pointed out that this does not occur is you cho ...