Hi Gatto,
with your settings
69 seconds to align (threshold on 40 000 points)
Reconstruction (smooth, High, 20 000 000, 0, 5) 2590 s
Texturing (Adaptive ortho + average + 8000x8000 after decimating to 4 000 000 faces) 1300 s
Total 1 hour 6 minutes
My settings version 1
69 seconds to align (threshold on 40 000 points)
Reconstruction (height field, medium, High, 20 000 000, 0, 5) 144 s
Texturing (Adaptive ortho + average + 8000x8000) 67 s
Total: 4 minutes 40 seconds
My settings version 2
69 seconds to align (threshold on 40 000 points)
Reconstruction (height field, high, High, 20 000 000, 0, 5) 1041 s
Cheers,
Geert