Since the game is finally complete, I've started from the very beginning for the first time. I played through the power plant/dam/sawmill, reached the tunnel and exited. And decided to check the achievements. According to them, I'd made only 14 damage photos, and it didn't feel right. I searched the forum and found out that whenever you died, some photos could be lost. So I repeated all that part of the game. I didn't die at all. And after I checked achievement counter, I was still at 14 photos. I checked the walthrough then. Apparently I'd found 12 out of 16 spots before I even reached the dam, and there were many after obviously. Not sure about the second photo achievement, there's a chance I've really found that few of them. But this one is not working properly for me at all.

BTW, I'm really enjoying the game so far, you've found that sweet spot between walking simulators and Myst-like games. But broken counter combined with a little bit of OCD partially spoils the experience for me.