I’m not sure why you would have ‘skylight’ as moveable… as this is often (?) used for indirect lighting (ie the lighting from the ‘sun’ that is scattered back due to atmosphere etc). You would often have the directional lighting movable (change time of day) or point lights (something attached to an actor)… IMO. the point is that static lighting (eg light maps) take a lot of computational effort on the devs computer - but doesn’t take much computation on the users computer (and vice versa).