Hey there! The spritesheet for this tileset is basically a texture atlas, and the intended use is to parse the metadata file and load the pieces from it in your code. This is one of my older tilesets, and my more modern tilesets are grid-aligned and can be used in the more standard way you're expecting. I'll put this on my to-do list for an update, thank you for reminding me! In the meantime, as a workaround: The spritesheet for this tileset is quite small, and it should be possible to move the pieces to align with the grid and resize the image to be a multiple of 8px.