Look at this crown. That's not molded plastic, but glue. Add dots, then let them dry. Apply more until there's a complete, self-supporting structure.
That's what shirOxxx, also known as Twitter user @white0314noriya, does. Rocket News 24 says that by gluing with precision using different color glue sticks, he can create marvelous solid sculptures, such as these:
This is an apple that shirOxxx painted, then glued.