Historically, questions were deferred to stackoverflow. Over the years, there have been some great answers that serve as fantastic examples. I saw an answer the other day and thought it was pretty interesting to share, and even graduate it to an example that ships with the library.
Stackoverflow user 2pha answered a question on a fast method to engrave text on a mesh. The snippet has a small interactive canvas that acts as a way to draw an input image that acts as a bump map:
If you find other answers which you think are worth keeping around, post them here.