The doors would be best on SYMBOLS WALLS sheet and WALLS FEATURES layer, as they are in all the dungeon styles. And walls should be on WALLS Sheet and WALLS layer

Great session - quite inspired. Thanks, @Ralf

Pity it isn't on the catalog button, like all the other symbols - could this be fixed, or is there way to do it?

This is the very first time I have done anything perspectives or isometric. But I was inspired by Ralf's recent video, and the current Annual issue, so I decided to give a big city a go.

Here is my initial layout - cliffs, main roads, coast and walls done.

One observation - the walls look a bit artificial with the straight parts and only 4 directions. But I hope that will not be so obvious once I add vegetation and buildings.

Comments, as always, welcome - you can only help me get better.

Further progress. Not sure if I should put texture for the floors or not - I will have to for the next 2 floors.