Unreal Engine Issues

[CrashReport] <unknown module>!UE4Editor_Core!FDebug::AssertFailed()

Error message: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 678] Array index out of bounds: 0 from an array of size 0 Source Context: 80 } 81 else ...

No easy way to disable a sense in AI perception

UGameViewportClient::LostFocus() flushing input when focus is still on a descendant

See UDN thread. Can we check HasUserFocusedDescendants() so we don't flush keys when the focus is still inside the viewport? ...

Particle CPU cost highly increase at second "show" of a streaming level.

It seems that Particle CPU cost highly increase at second "show" of a streaming level. The Licensee's team sent a sample to reproduce this problem. So I put the project and wrote how to reproduce on ...

Destructible does not return Hit Bone Name when using OnComponentHit Event

When using a Destructible Mesh in a bluprint and trying to return the Hit Bone Name will result in "none" being printed. However, using a simply line trace from the individual bone names from a frac ...

Full screen mode when using a laptop with Optimus ignores the gama setting

When using full-screen mode on a optimus laptop the gama that is set for the system appears to be ignored and uses the default setting, even if it has been adjusted in Windows display calibration se ...

Modulated Shadows on IOS cause flickering on Skeletal Meshes

Modulated shadows are not functioning properly on IOS devices for skeletal meshes. Any skeletal meshes in the scene will cast a shadow, but have a flickering modulated shadow on the skeletal mesh as ...

[CrashReport] UE4Editor-Core.dylib!void FGenericPlatformString::LogBogusChars<wchar_t, char>()

Unreal freeze on 35% and after crash Crash Report: [Link Removed] ...

AttachChildren on the client can lose entries

If a client attaches a scene component to a server authoritative scene component and that server component later has a change in attachment made on the server, the AttachChildren array on the client ...

FBX imports non-sequentially named Skinxx id's will not import all material elements

When importing an asset that is using the naming convention for SkinXX to order material elements does not work properly when the elements are not sequential. Any material that is not in sequential ...