Unreal Engine Issues

Unreal Lightmass does not build by default when building Solution from Promoted Github 4.12

When building the Promoted 4.12 Solution from Github as of the 4AM commit, the Unreal Lightmass project does not build by default. This results in the inability to build lighting until Unreal Light ...

TMaps with instanced objects: modifying instanced object data in child affects parent

Given a TMap where the value type is an instanced object: when a child blueprint is saved with modifications to the TMap, and then additional TMap are added to the parent blueprint and the child blu ...

Debugging Motion Matching in 5.1, looping animations don't loop root correctly

Just trying a few simple animations in 5.1, I have a few short looping cycle animation that go in different directions. I see very bad results and it looks like it's because of how MM is assuming th ...

Launching game through Right click > Launch game feature from the file location with crash 4.5

When launching the game with the -game flag or through right click > launch game in the project folder will result in a crash in 4.5 if there is a library containing a macro. ...

Frame specific functionality unusable in Composite/Montage editors post 5.2 changes

Part of the changes for 5.2 required UAnimCompositeBase::GetSamplingFrameRate to be changed to return a very high framerate.  This has the unintended consequence of effectively making the functional ...

Light does not affect landscape splines in raster pipeline (non-RT)

Spin Box delta does not appear to affect how the spin box increments through its values when clicking and dragging with the mouse

Spin Box delta does not appear to affect how the spin box increments through its values when clicking and dragging with the mouse. The spin box appears to increment/decrement by more or less dependi ...

Preview weight on Landscape Layer Sample affects Grass Output on landscape disregarding layer info

Preview weight on Landscape Layer Sample affects Grass Output on landscape disregarding layer info Repro Rate: 3/3 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did NOT occur there ...

Editor crashes if a sublevel with a landscape is duplicated then added to the persistent level as a sublevel.

If a sublevel is duplicated and contains a landscape, the editor will crash when the duplicate level is added to the persistent level as a sublevel. Frequency 4/4 Regression (yes) issue (does not ...

Unable to select foliage by left clicking after 1.5 k foliage meshes placed

When using the foliage tool, once the mesh count reaches around 1.5k and higher you will be unable to select individual meshes by using the mouse. The lasso tool and the select all tool work as inte ...