Unreal Engine Issues

Incorrect box collision on negatively scaled mesh

If you have a mesh with a rotated box in its simple collision primitives, that box won't be in the correct position if you scale the mesh by -1. This issue was reported in 4.20 (CL-4212847) and rep ...

[Feature Request] Set Overridden Light Map Res

Set Light Map resolution via Blueprint or Python ...

[ CATIA ] Datasmith Error importing part from CATIA v5

When importing the attached CATIAv5-file Screw.CATpart via Datasmith, The following error is recieved: LogDatasmithImport: Warning: Failed to import '../../../../../../Screw.CATPart'. Failed to cre ...

Create Blocking Volume from multiple selected Staticmesh actors in viewport generates messed volumes

The result unexpected: The collision volume shape generated was just strange and much bigger than it should be Expects: The collision volume generated should wrap up group of actors and right fit t ...

Struct Boolean value can be changed when using a Set node for the struct in Blueprints

If a struct has a property with the EditCondition meta after a Boolean property that is set to the Boolean property, this Boolean property will be changed inadvertently when a Set node is used for ...

Cascade ParticleRelativeTime Outputs Constant 0 on Mobile

Cascade ParticleRelativeTime outputs constant 0 on mobile. Found in 4.19 CL# 4033788, 4.20 CL# 4302132, 4.21 CL# 4321618 ...

Mesh merge instancing can swap material ID

Can change type of event dispatcher in Blueprint

It seems that with 4.20 users are able to change a dispatcher's type from Multicast Delegate to something else (float, int, etc.) Doing so will cause any node that references the dispatcher via call ...

Startup movies do not support 1080p video, and fails silently in the process

1080p videos do not play as startup movies, and there is no indication as why given by the editor. 1080p videos will work with media framework. There is no documentation either, so there is no indic ...

FMD5::Update can crash when used with packages larger than 2^31

This bug was reported by Nurulize on UDN: UPackage::Save calls FMD5::Update at line 5918 The bug comes from the fact that Writer->TotalSize() is int64 vs the 2nd parameter of FMD5::Update which ...