Are these lines parallell or not? https://thumbs.dreamstime.com/b/empty-chessboard-4638365.jpg They don't appear parallell in the picture. Yet they are parallell lines in reality. If you would extend the lines of the board, they would go parallell like that to infinity, and never touch each other. Yet they appear to converge when you look at the chessboard from the side like this. Once you figure out this condurum, you can lay your crepuscular ray problem to rest.