Unreal Engine Issues

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 ...

Custom Primitive Data crash when used from Static Mesh Comp attached to BP Actor

When trying to edit custom primitive data on static meshes attached to a BP actor, an out of bounds access will occur. This does not occur when the static mesh is simply on a regular Actor (Same rep ...

Converting a modular character to a static mesh can result in a crash or in an asset with corrupted data

Adding Megascans 3D objects to a scene can cause Twinmotion to freeze and Crash on macOS.

Looking at the logs when it happened, the logs are spammed with the following: [2024.12.10-20.34.12:438][514]LogZenServiceInstance: Display: Unreal Zen Storage Server HTTP service at [::1]:8658 sta ...

A warning is needed for turning off "Update Navigation Automatically", large nav meshes can cause crashes

A warning is needed before allowing users to uncheck update Navigation Automatically. A user has done so and then created a nav mesh that was 1,000,000 by 1,000,000 in size and they can no longer op ...

Crash: Nativized AnimBP instances can assert on load in a cooked build with async loading enabled.

This is a regression that was introduced alongside a memory optimization for Animation Blueprint assets. Suggested workarounds:Disable "Async Loading Thread Enabled" ORDisable Blueprint nativizati ...

Alembic Importer does not import the correct amount of curves when using the Minimum Number Of Vertex Influence Percentage setting

This is a regression from 4.14.2 ...

Using ConstructorHelpers::FClassFinder in a GameMode constructor may result in a default value or crash if the level is reloaded multiple times.

Randomly selecting a character class from the GameMode constructor using ConstructorHelpers::FClassFinder can result in default or null character being set when the level is reloaded. It appears tha ...

Using a controller in HTML5 causes error

When using a controller in HTML5, the project crashes within the browser. However, this does not occur on Google Chrome. FireFox/Nightly crashes on launch on as well as packaging and running the pro ...

[CrashReport] libobjc.A.dylib!<Unknown> SEGV_NOOP at 0x0

User crashes at "Loading 83%" *See also attached Mac Crash Log. [Link Removed]Launched UE, it crashed upon launch.Ok, a file i wanted to delete, and it just crashed the whole program. Thx.Started e ...