Unreal Engine 4.27 Released!

[olof.karlsson]

@Vexar

All my post process materials stopped working. - Ran through everything I could find something changed in how full screen effects are handed so all my outline pp stopped working along with full screen effects. Try fixing it via the material, volume, project settings, nothing seems to work.

We ran into this issue as well, and it turns out that it’s due to a change in PostProcessComponent.h - previously it only checked the “bEnabled” flag, now it also checks SceneComponent()->ShouldRender(). ShouldRender() returns false when the post process component is attached to something that’s not visible - say, a player controller.

Our solution was to modify the engine to remove this change (in PostProcessComponent.cpp):

-               Ret.bIsEnabled = bEnabled != 0;
+               Ret.bIsEnabled = bEnabled != 0 && ShouldRender();

E.g. back to:

               Ret.bIsEnabled = bEnabled != 0;