Unreal Engine Issues

A Skeletal Mesh simulating physics that hits a Geometry Collection Actor with OneWayInteraction true, OneWayInteractionLevel 1, and is using Damage Propagation (default) will be accelerated so fast it immediately disappears by hitting the world limits

A Skeletal Mesh simulating physics that hits a Geometry Collection Actor with OneWayInteraction true, OneWayInteractionLevel 1, and is using Damage Propagation (default) will be accelerated so fast ...

Materials with Subsurface Profile not affected by Opacity value

A material with Shading Model set to Subsurface Profile is no longer affected by Opacity value in 4.17, 4.18, and 4.19 (Main) but was previously working as intended in 4.16. This is a regression. ...

Radial Impulse does not affect objects unless it can affect both center of mass and collision if center of mass is outside of collision

Firing a radial impulse does not affect an object whose center of mass is located outside of its' collision unless both the center and the collision are simultaneously affected by the same force. ...

depth calculation is not functioning properly on mobile ES 3.1 preview

In 5.1.1, the depth calculation is not functioning properly on mobile ES 3.1 preview, resulting in reflections occurring in areas where they should not. When checking with RenderDoc in ES 3.1 Previ ...

Point lights affect indirect lighting on RTGI much less than other types of lights

Only point lights affect indirect lighting on RTGI much less than other types of lights.[Link Removed] Indirect lighting of baked lightmaps look much stronger than RTGI.[Link Removed] Apparently, ...

Note visibility issues in 2025.1.1

ObjectScale returns a Cascade Mesh particle's XYZ scale as 1.0

Sampling a Cascade Mesh Particle's scale always returns XYZ as 1.0 This is a regression from UE4/Release-4.24.  This does NOT affect Niagara Mesh particles.  I've attached a Cascade (left example ...

The visibility state of on-screen stat messages is not restored correctly after entering and leaving PIE. This also affects other important on-screen messages like map warnings and debug messages.

Currently, the ShowStats viewport option is automatically enabled when entering PIE and automatically disabled when exiting PIE. This forced disabling happens even if the option was enabled prior to ...

Nav Modifier Volume Not Affecting Nav Mesh Until it is Moved

Nav Modifier volumes are not affected the nav mesh until they are moved from their initial placement position. Found in 4.13.1. Reproduced in 4.12.5 and 4.15 Main CL 3163223 This is similar to [Li ...

Strange Behavior for LayeredBlendPerBone when Blend Pose 0 and 1 are in the same hierarchy

With Layered Blend Per Bone, if the bone for Blend Pose 1 is in the hierarchy below the bone for Blend Pose 0, then the Blend Weights have some odd behavior. Blend Pose 0 = root Blend Pose 1 = spin ...