Found this yesterday - made specifically with modelers in mind.
You can customize brick colours and patterns, and yes, you can specify 1/18 scale patterns. It generates a PDF which you can save, and then print off at your leisure. It's free, but donations are welcome.
http://www.paperbrick.co.uk/index.php?action=home
OK, so it's a resource rather than a tutorial, but it's extremely useful to us dio builders.
You can customize brick colours and patterns, and yes, you can specify 1/18 scale patterns. It generates a PDF which you can save, and then print off at your leisure. It's free, but donations are welcome.
http://www.paperbrick.co.uk/index.php?action=home
OK, so it's a resource rather than a tutorial, but it's extremely useful to us dio builders.