Unreal Engine Issues

Alembic file doesn't play animations when imported as Skeletal Mesh

When importing an Alembic file as a Skeletal, the animation and morph targets keys are there but when played in the Viewport or Sequencer there is no animation. This was reported and tested in 4.2 ...

Using a Sub Anim Instance causes a "Sub Instance Loop" Compile Error

Using a Sub Anim Instance causes a sub instance loop error when referencing another Animation Blueprint. This is a regression from 4.19.2 (CL-4033788) as it complied without error. This issue was r ...

Temporal AA and Motion Blur Does Not Work on Manually Animated Bones

Manually animated bones of skeletal meshes do not correctly work with temporal AA and motion blur even if "Per Bone Motion Blur" is enabled. Found in 4.20 CL# 4233996 and 4.21 CL# 4234136 Unable t ...

Fix the skeletal mesh merge tool material assignment, change the API to avoid confusion

UDN user ask us to change the API for the material to remove confusion with the material ID. Also apparently there is an issue with the skeletal mesh merge tool, the user did not give any repro ste ...

Add Curve via Anim Modifiers not working

Blutility context menu popup shows all pins inside function

ActorAction Blutilites are showing all pins inside a function. This does not happen with editor callable custom events. Also occurring in Main/4.21 CL #4221482 ...

Live Link Pose node silently fails in Standalone mode due to incorrect Module type

LiveLinkEditor Module is flagged as "Editor" and not "Developer" causing the Anim Node "Live Link Pose" to silently fail in Standalone mode. The node works correctly in PIE and in packaged builds. ...

Importing an Alembic File with "Skip Empty Frames at Start of Alembic Sequence" Enabled Causes Crash

Importing an Alembic File with "Skip Empty Frames at the Start of Alembic Sequence" Enabled Causes Crash. Found in 4.20 Preview 5 CL# 4173640 and 4.21 CL# 4207835 ...

Importing Alembic/ABC File with Large Number of Morph Targets Breaks Morph Targets

When importing abc files with several morph targets (as a skeletal mesh), some morphs do not import and the ones that do are distorted(see screenshots and attached project) -Number of morphs is no ...

Crash when trying to "Update Mesh Section" on any procedural mesh just after "Clear Mesh Section" and "Create Mesh Section" for different vertices and triangles.

the editor Crashes when trying to "Update Mesh Section" on any procedural mesh just after "Clear Mesh Section" and "Create Mesh Section" for different vertices and triangles. Found in 4.19 CL# 4033 ...