So I had this idea for an improvement to the way I render lines in Mars First Logistics. I've had a lot of people ask about how that works, so here's a (somewhat technical) thread about it and the improvement I recently made. The lines are rendered using edge detection. This is a post process effect where first everything is rendered to a texture and then we read that texture to work out where the lines should go. Here's what it looks like before and after applying the post process shader: