Simplify Block Model

Fences, the laggest blocks in Minecraft.

Hoppers.

Flower Pots.

Walls

Note: The gaps between two walls (vertical) is a bug in early version. Qwuiblington already fixed it.

Tripwire Hooks

Cauldrons and Brewing Stands

Actually the cauldron can be further optimized, if Mojang allow us to use transparent textures on it (and some other blocks).