Glad you’re watching this Gotz, as someone whose output is technically accurate, reliably measurable model and/or orthophoto (am I right?) rather than beautiful seamless visual work-of-art.
Not having yet gone into ‘ton of free documentation/tutorials on the web’ as Valerio recommended, I don’t yet understand the workflow/images Bill helpfully offered. But I’d wonder whether such super-simplification (single flat image on single flat plane, no ins and outs) would be relevant for technically accurate output?