Unreal Engine Issues

Allow Cinematic Control is reset to true when restarting the editor

When restarting the editor the viewport will have its Allow Cinematic Control flag reset to true. ...

World Partition Editor minimap build failed

The issue was reproduced when building a minimap for an open world level with no Actors with "Is Spatially Loaded" enabled. Placing additional Actors with "Is Spatially Loaded" enabled in the level ...

Deprecating a non-const blueprint interface function replaces the implementation of the event with an empty custom event

This behaviour is only observed when implementing the function as a custom event from a blueprint interface. This behaviour is not observed in actors where the blueprint interface function is implem ...

Gameplay Tags set as Default in Local Variables do not show as references in Reference Viewer

Normal variables with gameplay tag defaults will show up in the reference viewer.Other reference types used as a local variable default value will show up in the reference viewer correctly. ...

Single sided complex collision mesh collision blocks character movement from backside

Commenting out the branch in FTriangleMeshSweepVisitor::VisitSweep is a work-around.if (CullsBackFaceSweepsCode != 0) { if (VectorMaskBits(IsBackFace)) { // Don't cull the back face ...

Keep Simulation Changes does not work for Actors that have replaced root component

RelativeLocation and RelativeRotation in the root component are collected in UActorComponent::AllUCSModifiedProperties, so copying simulation result is skipped in EditorUtilities::CopyActorPropertie ...

Niagara using a Volume and Mesh renderer with a shared base material does not renderer correctly

Using a shared base material with both a Volume and Mesh renderer causes the emitter to render as a glowing box at the scale of the bounding box. ...

Sampler Source: From Texture Asset with Streamed Virtual Texture

It appears that Texture Samplers for Virtual Textures do not respect the Tiling Method from the Virtual Texture Asset when the "Sampler Source" is set to "from texture asset". ...

Frustum culling provides inconsistent results causing particles to render even when the bounds are out of view.

When the camera is just outside of the box bounds and it is angled directly away from it , it will start rendering the particles again (as determined by stat GPU differences) despite being out of vi ...

Data loss with subobjects in Blueprint arrays