DzinEye

Definitely way waaaay less common than an exterior one. I have to be honest, I was a bit bamboozled by this part of Scott's response. Like you, at first I thought that he was suggesting that we can add a cantilever material by adding another material to the ceiling finish default... but that doesn't make sense, so I decided that he just means whatever we set for the default ceiling finish is what shows up as the default 'cantilever underside' finish. Absolutely

Thank you Scott. It appears then that there is not a way to have a different default Cantilever Underside material from the rooms ceilling finish material. Would be nice to have that broken out as a separate default... especially for exteriors.

If you create a room the room dbx shows the material for Cantilever Underside as 'default' ...but I cannot find where to change that default? If you go to Defaults Settings > Floors & Rooms .... neither Floor Dbx's nor Room Dbx's will show 'Cantilever Underside' so a material can be selected.

Pull back your roof gable overhang to be flush with the wall, then add a separate roof plane for the overhang area and turn off the boxed eave.

Don't think you can convert to any kind of wall, but you could Copy/Paste-in-Place the polyline, convert to plain polyline, then reconvert to a molding polyline and give that molding properties that would mimic a garden wall (size, shape, materials).

Chief has one of those in the library (just the roof part) which you might be able to utilize.... otherwise you just create a porch room and use the roof tools. Search and read about curved roof planes... the settings are in the roof dbx.

What background have you applied to the camera? Try different ones... but also try different sun intensity settings. I've never been able to get a bright background with PBR, but my backgrounds don't show as gray unless I don't have a background selected. For what it's worth...When I want the background to pop more, I've always resorted to the billboard background method

In your example (which looks like a digital model) the actual roof planes are barely flared at all. This look could probably be faked by modeling flared barge rafters that the gutter hides behind. I'm not a big fan of 'faking' but if this is the example they sent you, it might be enough to make them happy, and much less cost than an actual flared roof. Having said that, there are much better examples of flared roof eaves, and you might Google it and send them other examples where the flare extends further back into the roof to see if they really want to express that...and absorb the cost.

Have you tried making the rail manually instead of through the stair dbx ?

Like this?

So... no icecream?

Perhaps I'm not understanding ?

@DeLayDesign Compare these two areas...

Well... if your title question is the meat of your question, rather than everything you wrote in the post, then it looks like you might be able to use a room divider wall and uncheck flat ceiling above in the structure panel for the side with a vaulted ceiling. I think for anything beyond that you'll need to supply a lot more info.

Sorry to make an example from your post, but honestly... I sense you're frustrated, but settle down a second and try to look at your post from the eyes of a reader and potential helper. How do you expect anyone to help you from what you've posted here? You talk about not being able to do the roof, the ceilings, etc and there's a single picture of one area... and more importantly no plan attached, along with no other information showing what the model needs to look like. Also, please include your user information so we know what version of Chief you're using and perhaps some info about your computer. Try again...