Details panel is very slow when there are many items in an editable array (even if hidden) (was Tile Selection Lag within Tile Set Editor)

Tools - Jun 22, 2015

Selecting tiles within the Tile Sheet Editor becomes laggy after changing the size and spacing of the tile set. ...

Enabling Tessellation on Materials in 4.11 causes geometry to Disappear

UE - Graphics Features - Dec 23, 2015

Any material that already exists in 4.11p1, with tessellation enabled, causes assigned geometry to disappear. Any material created within 4.11p1, with tessellation enabled and a base color, causes t ...

Set Actor Location and Teleport from a Character when touching an Actor simulating physics will launch the Actor

UE - Gameplay - Jul 23, 2015

Set Actor Location and Teleport from a Character when touching an Actor simulating physics will launch the Actor. User supplied a video demonstrating the problem: [Link Removed] Test project in Pa ...

BoxCollision component must be simulating physics in order for collision and hit events to work

UE - Simulation - Physics - Jan 30, 2015

BoxCollision component must be simulating physics in order for collision and hit events to work. Note: This testbed doesn't contain print outs of the hit events due to an existing bug with adding e ...

Zooming with mouse wheel causes camera to jerk if zooming while the camera sets in a function

UE - Gameplay - Blueprint - Jul 31, 2015

If a collapsed or new function is opened and the mouse wheel scrolled to zoom the viewport camera in or out while setting in the new function, it will continuously jerk back to the original position ...

Player Capsule angular velocity can launch a player when stepping on/off a physics simulated object

UE - Simulation - Physics - Destruction - Mar 24, 2015

Occasionally the player capsule can be launched due to bImpartBaseAngularVelocity being enabled in the CharacterMovementComponent. Disabling this does not result in the character capsule being launc ...

Possessing a vehicle results in unexpected physics behavior

UE - Simulation - Physics - Oct 8, 2015

When possessing a vehicle, if you are standing on top of it with a character, once you begin to drive away, the vehicle will begin to be drawn back towards the character as if it is attached somehow ...

Auto Convex Collision will cause crash when using significantly small meshes

UE - Gameplay - Dec 16, 2015

A hard crash can happen when applying auto convex collision to a complex mesh that is below a certain build scale or screen size. The meshes that cause this have higher poly counts and increasing th ...

Mouse dragging cursor accelerates significantly on Mac

Tools - Jan 18, 2017

This also occurs in 4.14.3 This does not occur on Windows. Could not get this issue to reproduce while recording the screen with quicktime player, but if you experience it in person it really feel ...

Real-time thumbnails causing large performance issues

UE - Graphics Features - Feb 1, 2017

When Real-Time Thumbnails are enabled in the content browser and you have many blueprints with static meshes (or anything that is rendered in the blueprint's viewport), the real-time tooltips cause ...