This might be a dumb question but I've looked everywhere. I'm kind of new to Maya and I have a physical sky with two perpendicular planes creating a wall. I have an object in the middle with the planes acting as the background, but I can't get any shadows to cast from the object on to the wall or from one wall to the other (corner shadows). I have no shadows tab in the SkyDomeLight attributes so I can't access the depth map options. All I see is the cast shadows checkbox. What am I missing?