OK - Finally got around to this.
Totally manual capture.
25 images.
1 straight down.
8 each at 45/0/-30
Manual exposure
I switched Go4 to map mode to guess the panning angles … starting off pointing due North.
After each set, I obviously had to switch to FPV mode to adjust the camera pitch.
Another time, I will try better vertical overlap by doing the one straight down (90), then 8 at each of 50/10-30.
Overall I’m really pleased with the first attempt.
Downside? It’s slow to do.
Incidentally, I used a shot 90deg to the sun, with 25% sky / 75% ground to base the manual exposure.