Unreal Engine Issues

Popping Ribbon UVs

Please see the Additional Link for related UDN information. The UV popping described can be subtle, depending on settings; it's affected by spawn rate and GPU vs CPU. The popping shown in the gif t ...

The ConvertToDeviceZ in common.usf seems wrong

Display Blueprint Added Components on subobjects with meta = (ShowInnerProperties)

Right now only native subobjects are displayed in the details panel with meta = (ShowInnerProperties) is set. Child Actor Components are an example of this, where if the child actor you have added h ...

Macro Libraries do not update after rename

Macro Libraries can only be called by their original name, even after being renamed to something different. ...

A custom Blueprint node created using a code class derived from EdGraphNode can no longer be found in the event graph to be used.

Custom Blueprint nodes no longer appear in the event graph. This was working in 4.5.1, but no longer works in 4.6 and Main. Previously working: CL 2336109 No longer working: CL 2374938 CL 2375748 ...

Multiple viewports open cause wrong viewport to render in VREditor (HTC Vive)

Having multiple viewports open causes the wrong viewport to be rendered inside the headset. Positional/Rotational tracking is still updating correctly in the preview window. Closing the wrong view ...

Intermittent crash in CacheOptimizeIndexBuffer on Editor startup on Linux

Building 4.10 from the GitHub release branch on Linux fails to open after install and instead crashes User Suggested Fix: Switching triangle order optimization off with r.TriangleOrderOptimization= ...

Leading space in front of block comment above UCLASS Macro prevents compile

If a block comment is used above the UCLASS Macro, leading spaces before the start of the comment causes UHT to fail and the solution to fail compile with a "Missing 'UCLASS' in Class declaration" e ...

Crash when loading TM-MotionControllers in a packaged build

Packaged QA Game crashes when opening "TM-MotionController" This issue did not occur in 4.13 This is also affecting KiteDemo. Cinematic will crash when Editor Content is not included in the packag ...

[CrashReport] Linux crash - FVulkanCommandBufferManager::WaitForCmdBuffer

This is a semi-common Linux crash coming out of 4.17.1. It is spread among a few different similar callstack affecting a handful of users. [Link Removed] [Link Removed] [Link Removed] [Link Removed ...