Unreal Engine Issues

CreatePatchLibrary is broken

It seems the FEditorShaderCodeArchive.LoadExistingShaderCodeLibrary missed some functions, use FEditorShaderCodeArchive.AddShaderCodeLibraryFromDirectory instead could fix the issue. ...

Megalights support for anisotropic materials

A licensee noticed that SUPPORTS_ANISOTROPIC_MATERIALS is not passed to FShadeLightSamplesCS::ModifyCompilationEnvironment for MegaLights ShadeLightSampleCS. Adding it fixes the issue. ...

Local Vector variables in functions do not save the Y and Z values

Local Vector variables in functions do not save the Y and Z values. Possibly connected: after entering the X value, pressing Tab does not move to the Y value. Tabbing from there works as expected. ...

Alembic Importer does not import the correct amount of curves when using the Minimum Number Of Vertex Influence Percentage setting

This is a regression from 4.14.2 ...

AreaFlags Empty During First PIE Session After Hot Reloading

AreaID always seems to be empty during the first PIE session after hot-reloading. Only able to test in Dev-Framework CL# 3221683 due to the licensee's project being created in 4.15 and not being b ...

Incorrect config property serialization for UStructs used as TMap keys or contained in a TSet with a single value. Diffs taken from default-value of each member type, instead of from default-value of the struct

Consider a UStruct with some basic type members, each one with a default value specified in the struct. Also consider a TSet or TMap with that struct as keys, used inside a UObject as a UProperty an ...

Creating a float variable named lifespan in an Actor Blueprint and setting its default value will override the life span of the parent class

Creating a float variable named lifespan in an Actor Blueprint and setting a default value for it will override the parent class' life span setting. I was unable to find any variable in the Actor cl ...

NiagaraEmitter using Grid 3D Template of NiagaraFluid plugin at coordinates greater than about 10.5 km is not displayed

Multiple keys with the same value appear to be removed on Android for a Curve Table

When using a curve table on android it appears that keys with duplicate values are removed. Link: [Link Removed] ...

Meshs in a hidden sublevel may generate incorrect navmesh

If the level has hidden sublevels, the regenerated navmesh result appears to have a hidden sublevel mesh placed at the origin. Apparently, the reason is that bNavigationRelevant is no longer consid ...