Unreal Engine Issues

BSOD when launching Twinmotion on NVIDIA 50-series GPUs with 576.02 Drivers

Reported from multiple users. NVIDIA RTX 50-series GPU users are reporting BSODs when attempting to launch Twinmotion with the latest drivers installed. The crashes occur on the 576.02 driver versi ...

[AI] Area Class to Replace does not work on SplineNavModifierComponent

The SplineNavModifierComponent does not have the same behavior as regular nav modifier components where the modifier can specify that it only replaces a given NavArea class. Setting the area class t ...

Cannot export a Datasmith scene to the Unreal Engine project root folder on MacOS.

This is mac specific. I could do the export normally on Windows with the same Twinmotion CL and UE version (5.5 preview).  It is also a regression specific to 5.5, since I've been able to export a d ...

Intermittent Crash in Pose Search during Cook

User reports that they've been running into an intermittent crash in Pose Search during Cook. Pose Search attempts to index data outside the bounds of an array. Based on the logs, each asset seems t ...

Crash when two textures reference eachother as composite textures

When (unintentionally) trying to set one texture as the composite texture of another, which itself is the composite texture of the first, a stack overflow occurs leading to a crash: in UTexture::Pos ...

FBoneContainer::MakeMeshPoseIndex crash (out-of-bounds array)

Mover flying mode rotation changes may be incorrect with roll involved

A licensee has reported that Mover's method of adding rotators together may produce different results than quaternion multiplication - for example in Flying mode when roll is involved. We will inve ...

Iris - check hit in FNetBitStreamWriter::InitBytes if object has only COND_InitialOnly replicated properties

InitOnly FReplicationStateDescriptors will have a value of 0 for ChangeMaskBitCount, so if an object only has COND_InitialOnly properties, its FReplicationProtocol will also have a ChangeMaskBitCoun ...

Iris - Function descriptors will prevent protocols from being marked as fully push based

RigidBody parameters not working (external force and others)

We are running into issues where the parameters of the RigidBody node in an ABP are not being applied at all when running the ABP in PIE even when the parameters are working correctly in the ABP pre ...