Unreal Engine Issues

Lightmaps cannot be created correctly when copying Blueprint that has Static Light as Child Actor component on the level

In this project, BP with Spot Light registered as Child Actor is placed. If we copy and build, the following warning will be displayed. BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_330 'BP_Spotlig ...

Blueprint interface function with the same name as a node gets fused

Creating a Blueprint interface and changing its function name causes a crash when using the undo button to change the name back. ...

Deleting a bound function from a widget sets the binding to None which causes compile to fail

Deleting a bound function from a widget sets the binding to None which causes compile to fail. Deleting a bound function from a widget sets the binding to None which causes compile to fail The li ...

Net Multicast RPC functions do not fire other session members properly

Using a multicast function does not call the function on both client and server. The functionality in this reproduction project can be found in the BP_MyPC blueprint. Regression?: No This occurs in ...

Mouse Not Functioning Correctly with Multiple Displays Connected to Mac

When using mutliple monitors connected to a Mac the mouse behavior does not function well. Attempting to navigate and drag windows to and from individual displays proves difficult. The user reporti ...

When Building Light for a SubLevel of a project, BSPs will be built into the level regardless if hidden or not

BSPs will be built with light/shadow extrapolated even if they are placed in a hidden sub_level of the project at the time of building. Also Tested in 4.10.4, 4.11 Preview 6 and Dev-Editor-CL-28772 ...

[Feature Request] Support Lighting Channels for Skylights

Lighting channels for skylights would help for streaming levels that include both outdoor and indoor environments. https://forums.unrealengine.com/development-discussion/rendering/78203-lighting-ch ...

Collapsing a local variable Get/Set node into a new function or macro will result in a BP compile error.

We currently overlook local variables being collapsed into new function and/or macro graphs, where they are no longer in scope. Current workaround: Manually delete local variable "get" and "set" no ...

Area lights reflections are not occluded by objects between reflection and the light

Adding an output to the default function of a Blueprint Interface now requires the Interface to be compiled in order to change the output's values

In 4.27 immediately upon adding an output to the default function that output can be edited without needing to be compiled. In Preview 2 once an output is added the Blueprint Interface needs to be c ...