[unbearded]

I would say the quality is relative to your input and to what type of application you need results for.

If you are gonna use the pointcloud as a cheaper and faster alternative to LIDAR and need to take measures with centimeter precision, you will need a lot of overlap (we use 75%) and the drone to take the photos automatically to be sure it covers most of the desired area. I would also recommend a commercial tool for the task. We have jobs that take one week to process with state of the art hardware.

But if you just want to do it for fun, you won't need to get this complicated and can do even with your phone.