Algodoo

This is not 1 million photos. It is more around 45 thousand, and if you want the math, check my next comment.

I first scaled the block up a bit so I can actually measure the individual pictures. After that, I calculated the block size to be 419m by 234m (rounded to the nearest meter). The individual picture size to be about 2m by 1.1m (rounded to the nearest tenth of a meter). I then multiplied each of the numbers, so 419 x 234 is 98046 (which will be rounded to 98 thousand), and 2 x 1.1 is 2.2. I divided both numbers, and 98,000 / 2.2 is about 44545 (rounded to 45 thousand). All of this math shows that this is not 1 million photos.