Wow, quite a lot of interesting tests! I hope you managed to pick one and refine it further. There are some really great ones here. In particular I like 6, 7, 8, 9, and 12. I have been surprised to so far to not see more formations like the lumpy volcanic rock in the foreground of 6 and 7, or obvious geothermal vent areas like 8 and 9. 12 actually looks oddly photograph, which is interesting considering how saturated and barren it is. But Iceland can be like that...
- Oshyan