You do realize that with this, you're going to kill some of the most popular servers on blockland. You know, Nobot's Death race, Pecon's boss battles, etc. You know, because they use terrain and interior maps.
Luckily for them, they can still build just fine and replicate all of these interiors with bricks.
Bricks look better than interiors and now will cast shadows. There is no reason not to.
Edit: I'm actually really excited to see the new Blockland advertisements made with the new GFX and stuff.