Opacity/Placement

Many transparent blocks exhibit unique behavior when it comes to being placed or being placed on. This page covers only those blocks that exhibit unique behavior. For example, glass is not covered as everything can be placed on it. In addition, only blocks that need some sort of support are covered in the columns.

Everything cannot be placed on the side of:

Doors and trapdoors behave in unique ways. The flat side of each block acts as a solid surface, allowing anything to be placed on it. However, all other sides act as non-solid blocks. Because of this, many blocks that can be placed on doors and trapdoors do not stay in place if the door or trapdoor is opened or closed.