@duerer I didn’t 🙂 All the tiles were the same size in my original blockout. All the slight differences I added later in photoshop. The main idea is for tiles to slightly vary in size and position, which would give them a more natural look. It doesn’t have to be exactly like on my piece. Just be careful and don’t overdo it, otherwise it will turn from naturally organized to just messy.
Also all the walls are strictly vertical. There’s no widening in any part of the house. It might be perspective thing caused by lens distortion or something.