Several years ago (2009), I released an alpha map called re3streetsa for left 4 dead 1. At the time, I was relatively new to mapping. The reviews were quite negative. While it may have left some scars, it also pushed me to do better. I wiped the slate clean and started fresh on an improved version which is no part of version 1.1. Here’s a series of screenshots that show the differences between the alpha map and the current release.