Unreal Engine Issues

Memory Leak With NullRHI

Crash when adding a pawn that has a SetSenseEnabled node set to true on Begin Play and then playing the game

When adding the SetSenseEnabled node to a Pawn and controlling another pawn that has an AIPerceptionStiumuliSource, the editor crashes. I tested using other senses such as Hearing and the crash occu ...

There is a moment of T pause when Post Roll Frames is enabled and snapping is enabled

When I turn off snap, the problem does not occur The problem does not occur in 4.24.3 and 4.25.4 Occurs in 4.26.2 and UE4main ...

Adding a new component to a parent class breaks child Blueprints

See UDN(308147): [Link Removed] ...

RemoveWindSource modifies game thread array while in a parallel for loop.

FScene::RemoveWindSource is called from a parallel for loop, and concurrently deletes wind component pointers from the same game thread array causing crashes when the scene contains multiple wind so ...

Crash when adding a Material Layer with a Static Component Mask Parameter node to a Material Instance

When adding a Material Layer, that has a Static Component Mask Parameter node in it, to a Material Instance, the editor will crash.   The ability to set Material Attribute layers in a Material Inst ...

Sphere Trace Distance Field GPU function hides necessary Collision DI input

The collision DI input is a hidden input, but is necessary for compilation. The input node should likely be marked as required, not hidden.  ...

Virtual Texture not available in the Material Domain settings of a Material

Virtual Texture is not available as an option for the Material Domain. Even if Virtual Texture support is enabled in the project settings. Tested in //UE4/Release-4.25 @ CL 14469661 and this did ...

Landscape Distance Fields artifacts when using DX12

This problem was reported in this UDN:https://udn.unrealengine.com/s/question/0D52L00005PbEYNSA3/landscape-distance-fields-artifacts?fromCase=1 ...

Crash when copying and making a button widget the root of a second widget blueprint

Pasting a button element from one Widget Blueprint into a second Widget Blueprint that has had its root Canvas Panel deleted results in a crash. The crash only occurs when the Canvas Panel is delete ...