Yes, there're a lot of scans joined (8 or maybe more).
You would be terrified to see how much basic is my setup...
Calib corner is just put (not fixed) on the back rest of the sofa.
My process is : Record my calib patern, then I turn on laser, kitchen timer, video recording. I close my eyes, and try to take place in the sofa without moving anything.
Stop breathing, counting up to 180 in my head, get up (still closed eyes), and turn off everyting. Usully at this step I record an other calib patern in case something has moved when I sit down or get up.
Of course proceding like this it's just impossible to get a perfect focus on laser line nor video...
Also my raw scans are wavy because of : low angle, I breath, calib corner make of cardboard.