So I’ve made a new scene/project to demonstrate the problem as clearly as possible.
Open the following images in your browser. Toggle between them and you will see that there is a big difference in the shadow’s position based on whether the PointLight is set to Stationary/Movable.
SM_Shutter = Pink Wall.
SM_Room = Yellow Walls.
I think Stationary lights are casting Movable shadows from an offset/wrong position.
Pointlight set to Movable. Pink Wall is Moveable. Yellow walls are Static.
Pointlight set to Stationary. Pink Wall is Moveable. Yellow walls are Static.
Pointlight set to Stationary. Pink Wall is Static. Yellow walls are Static.
The only thing changed between these images is the PointLight’s Type (Stationary/Moveable) and the Pink Wall Actor Type (Static/Moveable.)
Dynamic Shadows from Stationary lights are casting incorrectly for Moveable objects. When you’re trying to use a Stationary Light to create a Movable Shutter on a Window this presents a real problem.