Actually, I think this is the wrong answer.
I have the same problem - can't really capture a room: wall warp, doesn't meet back at the start point.
"Buy a more expensive app" can't be the solution - why is "Room Capture" so bad?
I don't want to Scan To Cad, I just want a good starting point for my own app.
If using the API as demonstrated by Room Capture doesn't do it, then how do I get better results for my own app?