Unreal Engine Issues

Missing materials on the rear lights and windows of library vehicles

Reported in SF [Link Removed] The rear light material and window materials on Twinmotion library vehicles are not present on many vehicles in TM 2025.2. Confirmed affected vehicles are in the foll ...

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 ...

Crash when destroying a geometry collection actor

When an actor with geometry collection is destroyed, the engine doesn't remove elements from array in the ChaosSolver So illegal references occurs. Removing element with following quick fix code ...

On the Details Panel of Niagara Function Inputs, the Type selector does not show "Static" types.

Consider a Niagara Function or Module Script containing a Static Switch node. If the "Expose as Pin" option is enabled for its selector variable, an input pin with type "static bool" appears. In one ...

Crash in WP conversion commandlet on map containing geometry brushes

Compiling twice then pressing play/stop after creating a c++ Game Instance causes a crash

This is not a regression. After creating a C++ based Game Instance the Editor crashes if you compile twice then play and stop. ...

Cannot Delete Event Dispatcher inside of a child blueprint when the parent has an event dispatcher as well

If the user creates two blueprints and parents one to the other and then creates 3 event dispatchers in total between the two in an alternating method it will cause and error and the event dispatch ...

User cannot undo the automatic changing of Mobility settings

When the users causes a component to automatically change its Mobility setting by changing that setting on a parent or child component, undoing that change only affects the manual change caused by t ...

Building lighting fails on Linux

When building lighting on Linux, the build process fails because UnrealLightmass cannot find the library libUnrealLightmass-Serialization.so. Reported using Mint Cinnamon 17.3 Internal machine uses ...

Refraction breaks Translucent Sort Order without Separate Transparency Enabled

With multiple Translucent Material sorted in 3-D space or via Transparency Sort Priority, if one of the materials uses refraction it will render on top of the others no matter position or sort prior ...