Light Resource for Doors & Windows

Hello everyone,

I tried to find some info on how the Light resource in the warehouse works, especially for doors & windows but I came up with nothing. I'm having weird issues with how the light renders in game with the doors and windows set I'm working on. For instance, when used inside, I have different lighting behaviour on the two sides of the doors.

Does anyone know, by any chance, how does exactly this works, what exactly the "At", "Right", "Transform", "V1", "V2", "V3" correspond to and how does it translate relatively to the model?

Many thanks!