scottharris

With a computer that supports real-time ray tracing (GPU), you can make renderings in seconds – of course that is after you build, decorate, and light your model.  If your computer does not support real-time ray tracing (GPU), you can use the CPU; it takes minutes to hours for a render.  Attached are two GPU render examples and one CPU of the latest Chief Architect X15 Silverton Sample Plan.
 
Chief Architect models can be exported to external renders - like Twinmotion, and achieve additional fidelity with the renders.

Levina - I opened your plan and took a 3D view.  I'm seeing terrain.  

Attached is a simplified “materials & objects” plan (X15) I use for each of my projects.  I bring this forward into each new project and then update it to reflect the materials or other items (like cabinets, islands or vanities) I want to render out for layouts or just to render the individual object.  The cameras are saved to make it relatively easy to update and obtain the view I’m after.  Hope this helps.

Kitchen-bath-materials.zip

Drawing exterior walls clockwise can keep the outside layer on the outside.  If you draw them counterclockwise, once a room is formed, the walls will auto adjust to the outside.  So, it may not really matter which way you draw them. 

If you change your wall structure from 'balloon through ceiling above' to 'automatic' the windows seem to work fine.

You can manage your note information in "Note Type Management" via your CAD > Text menu.

The ‘lower wall type if split by butting roof’ tool you mention is available in Home Designer Pro and Chief Architect Premier/Interiors.  For your work around, you might try a section view, use the backsplash tool, reshape, and paint it.

The Mac M1 computers now run with Chief Architect X13.

Charlene, raise the elevation and thickness of your p. solid; BTW, I usually draw these in an elevation view to avoid figuring out the dimensions for the elevation.