Thank you for the timely responses. I do know that the app requires one to tell it what to do. It clearly has a number of "smarts" built into it as well. The issue happens when us novices think we are telling it things (i.e. this is now an interior room because I have connected the walls), and we really are not. Which then requires us to go back and change every (or many) details manually. Classic example is when pulling a roof plane to a vertical wall. HDP should, and often does, snap it to the wall and take care of the siding and shingles connection. Other times, I see the OSB in the rendering (instead of siding) as the roof plane seems to be cutting off a layer of the wall.
In terms of the doing the "reset do defaults," I'm concerned that it might really screw with the plan. The existing structure (and now the remodel) has many "step-downs" and varying ceiling heights. Obviously, I can save a copy and see what it will do. However, if you happen to read this and you are aware of the answer: will it change ALL rooms to the defauly - including those that I have manually altered to match the structure?
Lastly, I started to follow this post from a few years back regarding Z fighting (just to clean it up): "Use "Edit - Edit Area All Floors" command AFTER you first establish a current point at zero Y - Zero X, then once All Floors are selected you use the "Point to Point" move tool to finish the matter. Done properly with the correct command and set up it should be easy to do and in the future, establish your Zero X - Zero Y point to start your new project in plan view."
However, while I can easily tap EDIT > EDIT AREA > EDIT AREA (All floors). I have no idea how to then select all floors to move the plan. Clearly, this not critical as I don't think I'm experiencing the Z fighting issue. Just a comment if you can point me somewhere.
Thank you again for your assistance. Really appreciated.