I didn't see this offhand, so sorry if it's already posted elsewhere, but this week Tony DiTerlizzi is doing new sketches of Planescape material. (Apparently he does "warm up sketches" before he works each day and decided to do revisit some of his Planescape work. So some of it is just re-sketching earlier work, and others are actual re-design like his more alien looking githyanki.)
Here's the first and you can use the link at the top to go through the rest.
Pretty fun stuff. I also like his comment on the latest one:
I realized I added lots of clothing, armor, belts and tassels, to hide my cursory figure drawing back then.
Hmm. I still like the way githyanki are drawn in Guide to the Astral Plane best.
I think the newest drawings make them look too much like sci-fi space aliens.
BoGr Guide to Missile Combat:
1) Equip a bow or crossbow.
2) Roll a natural 1 on d20.
3) ?????
4) Profit!