Unreal Engine Issues

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 ...

Curves in compressed additive animations interpolate incorrectly when two keys in a row have the same value

Curves compressed from additive animations will not interpolate correctly if they have two keys in a row with the same value. The second key will be ignored, leading to the curve interpolating earli ...

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

Set world or relative rotation on a child component sets the wrong rotation

Unexpected results from setting relative rotation on child of child in BP. Also confirmed in Main CL 4302610 "I have found that changing this code from RelativeRotationCache . RotatorToQuat (NewRe ...

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 ...

FRenderTarget::ReadPixels does not populate FColor array properly in packaged build

When the ReadPixels function is called, the FColor array that is passed in has its elements populated when in PIE and Standalone but array elements are empty in a packaged project. ...

View Distance sorting of Niagara sprites is incorrect when far from the origin

This problem seems to occur on both CPU and GPU Sims. ...

Crash on Assigning Material to Element 1 in Reimported Static Mesh

[Link Removed] When you reimport a Static Mesh with an Added Material ID associated with it and in the Static Mesh Editor assign a material, the engine crashes. Also reproduced in Main Promotable- ...

Blueprint needs to be compiled if another blueprint sharing an interface is compiled

Blueprint needs to be compiled if another blueprint sharing an interface is compiled Regression: This does not happen in 4.16 ...

Load Error with DeferredDependencyLoading

If re-define the macro USE_CIRCULAR_DEPENDENCY_LOAD_DEFERRING to 0, the component is editable in detail panel. But I'm sure it's not a good fix. ...