Okay, I have this lighting Imagespace that I'm really happy with, it looks awesome. Vaguely like a steampunk fantasy world. Problem is, if I enable the Sky, it totally overrides the Imagespace. If I don't enable the sky...well, no sky. Is this just something about Interiors that is intrinsic, or is there a workaround?

Set up roombounds and assign the imagespace to the roombound. That way, you'll have sky outside your interior, but have the imagespace settings within the roombound.