javatom

Use a room divider at the point you want the wall to stop.

Make a 3 5/8" thick (standard brick size) P solid that is slightly bigger than the chimney. rotate it 45 degrees. Make a second one that is -45 degrees. There are many other ways to do it involving trim or even material regions.

It is probably the dimension of your roof framing that is making it look like this. You could try a smaller structural element and see if it changes what you see.

It is not possible to install crown on a vaulted ceiling (in the real world). You will hear from know it alls that it is possible but it will look bad. It is just a geometry problem of multiple angles that can not line up.

Do a search on "custom muntins". you can make a cad block and convert it to what ever you want it to look like.

Look at the top of your screen. Find the "Edit" category. Click on it and go down to "Edit behaviors". Look at the menu that pops up and select default.

Without seeing the plan it can be hard to tell. You might try opening the terrain dialog box and set the surface smoothing and triangle count to LOW.

I made the arched roof and let the back of it bear on a straight part of the porch as an overframe since that is how it would get built.

You can use a full height cabinet at the door.

The client would love the design but want the tree changed.

Make the window taller then redo the "match roof".

Break the wall in 2 places that are the width of the gate. Angle the wall to show it as a gate that is open. You will have to use an invisible wall where the gate is located so it will continue to be a deck.

The walls that are lower appear to be inset from the foundation below. They might be out of alignment. You should also rebuild your wall framing so it can update correctly.

You might have the room definition set to DECK and it is generating the supports and footings. Try changing the room definition to something else and see if it goes away.

How about a note with an arrow pointing to where it should go.