Unreal Engine Issues

CLONE - Crash on draw material to rendertarget

This crash has started occurring in 4.15.2. It seems to be a regression from 4.15.1. ...

Sequencer auto-generated thumbnails should not replace manually-catpured thumbnails.

Rolling ball physics bounces on flat landscape with low fps

It's been reported that using the rolling ball physics on a flat landscape will cause the rolling ball to bounce when it crosses a seam. It does not happen on every single seam, but it happens prett ...

Adjusting Agent Radius in RecastNavMesh causes AI to not move

Adjusting the RecatNavMesh in a map can cause the AI to not move when simulating or playing in viewport. Setting it back to the default value does not fix the issue. I can only reproduce this with ...

Vertex Interpolate Node Doesn't Work with Lightmass

The vertex interpolate node doesn't work with lightmass. Found in 4.19 CL# 4033788, 4.20 CL# 4233996, and 4.21 CL# 4258917 ...

Rendering Movie from Matinee freezes Instance of Editor

It looks like the Output Folder definition in the Render Movie option of Matinee is causing an issue when trying to capture Movie, if changed to a shorter file path (Desktop as opposed to Users[User ...

Contact Offset no longer appears to have an effect

When modifying the contact offset in a project it appears to have no effect. The setting that worked in a previous engine version (4.19) now collide in the same way as the default settings. ...

Crash when deleting BindingOverrides if the target property is left open on the details panel

Crash if opening ALevelSequenceActor::BindingOverrides in the details panel and run a process that empties the BindingOverrides elements. Workaround: FMovieSceneObjectBindingID FMovieSceneObjectBi ...

Vector VM - Crash / memory stomp when using > 255 external function calls

The Vector VM has only every supported a byte's worth of external function calls, when we blew the limit it would index into the incorrect VM call. The new VM will also overwrite memory when exceed ...

bStaticWhenNotMoveable in Lighting category instead of Physics

"UPrimitiveComponent::bStaticWhenNotMoveable"'s category is set to Lighting, not Physics. This causes it to be hidden when lighting-related properties are hidden, even though it controls physics sta ...