Triple Moon Cottage

Slartibartfast

I'm having a weird problem with this environment. Whenever I load the preset environment setup, nothing I do makes the skybox ever render again for that scene. It's a constant deep purplish-blue no matter what I do. Loading the same render settings, with skydomes, that I use successfully with other scenes, makes no difference. I've carefully gone over the render settings to see if I'm doing something wrong, but I can't see a problem there at all. Dome and Scene, Infinite Sphere, Draw Dome set to On. I've made sure that the environment settings are the exact same as in scenes that show the dome properly. Even deleting all the objects from the scene doesn't help, so it doesn't appear to be geometry getting in the way. 

Is this a bug with the environment settings in Daz or am I just blinding myself to something obvious?