Saving Level changes the Rotation of actors with parent-child relationships

UE - Gameplay - Components - Nov 14, 2019

According to the licensee report, UnrealMath.cpp (588) constfloat SINGULARITY_THRESHOLD = 0.4999995f; It seems that this can be avoided by changing the above value. However, changing SINGU ...

Tessellation doesn't render in certain levels of ContentExamples with Intel4600

UE - Graphics Features - Jan 20, 2017

Tessellation will not be rendered in the examples inside of the Material_Nodes and Material_Properties levels of Content Examples. ...

Changing the scale of the widget reflector makes it harder to select actors in the viewport

Tools - Dec 29, 2014

When changing the scale of the widget reflector it changes the scale of the selection bounds of actors in the viewport. Example: When hovering over a box at a 2.0 scale I will select the wall someti ...

Spline Mesh With Negative Start and End Scale Has Broken Lightmap

Tools - Apr 25, 2017

When you have a negative start and end Scale for a spline mesh the resulting lightmap that gets baked for the mesh will be incorrect. ...

Details customizations with object references can cause map loading to fail.

Tools - Jan 23, 2018

This crash can be reproduced by adding a graph editor to a details customization.  This crashes because the graph editor is holding a strong reference to the graph object on the actor component duri ...

AI character does not recognize controller/behavior tree input when spawned during game

UE - AI - Jun 21, 2015

AI character in user project does not react to behavior tree commands when spawned during play. In the specific example attached, the first pawn works correctly, but when removed from play and a n ...

Blueprint drop down menu constantly flickers with negative zoom

UE - Gameplay - Blueprint - Oct 21, 2014

DESCRIPTION: The drop down menu of blueprint nodes constantly flicker at negative zoom REGRESSION: Yes Broken: 2330325 Worked: 2304027 (4.5 branching point) ...

Refraction not working with MakeMaterialAttributes

UE - Graphics Features - Sep 14, 2015

When setting a material to Use Material Attributes and then feeding in a Refraction value with MakeMaterialAttributes, the refraction doesn't work properly Reported in 4.8, but I tested in Main as ...

Collision jitters when going up stairs, causing erratic overlap events.

UE - Simulation - Physics - Jan 11, 2016

When overlapping with another object while moving up stairs with a character, the overlap events (OnBegin / OnEnd) that occur will be called multiple times in an alternating fashion. This will also ...

Vertex Painting - Unexpected behaviour when painting Skeletal Mesh with Low Radius Brush

Tools - Oct 21, 2019

Unexpected behaviour when painting skeletal meshes with small radius brush. This does not occur with static meshes. Confirmed in 4.25 MAIN @ CL 9730599 ...