Carpenter’s Blocks 1.7.2 and 1.7.10 is primarily a modification that allows us to break with the basics of Minecraft as its cubes can be changed to create new types of buildings.
Really is just a visual effect, because when placing one of this new blocks you’ll see that this “block or cube” isn’t cubic but cut on a half. Whenever you walk on it will be as any cube.

Detail and Download here : Carpenter’s Blocks Mod

Homepage: Mods for Minecraft