The Sign Painter, also known by the username SignPaintr4evr, the alias the Telescope Operator, and the alternate stylization of signpainter, is an omnipresent, yet unseen character in World of Goo. Save for Going Up, the Sign Painter's signs can be found in every level of World of Goo, however there is a largely visible diagram of how to complete the level written on a wooden sign implying it was from the Sign Painter. These signs contain useful advice, humorous information, or text that advances the storyline.