OK, removed everything and re-installed and it seems to be working now. Not sure what was wrong, but thanks for responding to my question.

Yes, that's what I am trying a simple rectangle. It also does not work on windows 10 with the latest SH3D.

<t>I have created a room I want to design. After creating the room I click the create walls button, and per tooltip, I double click inside my room to create walls. Nothing happens. No walls are created. Is this still possible or has the feature been removed and just forgot to change the tooltip?<br ...