You can craft pillars out of nearly all wood, stone, metal, and brick blocks as well as with the newly created marble blocks. You have a pretty wide variety of options to choose from and can craft the base, pillar, and top separately for even more customization.
With this mod comes functional chimneys as well. It gives you 3 different styles to choose from to suit your architectural needs. They will also show smoke billowing out of them if they are next to or above an open flame or active furnace.