[shazow]

Very cool, thanks for sharing! Another challenging dimension is to balance what the EVM is good for with the problem you're actually trying to solve. It's certainly interesting to work in an environment where inefficiency literally translates into money.

Going for literally every pixel is too expensive, so we went for deci-pixels (10x10 pixel blocks). Incidentally, the original Million Dollar Homepage took the same approach to avoid fragmenting the space too much.

[bonzini]

How expensive is the search for empty blocks going to be towards the end? Would it be possible to introduce a more efficient algorithm in the future, or would it invalidate past sales?

[shazow]

We have an array index lookup for empty slots, the search should be constant time throughout.