Final answer:
Julian Beever is recognized for his exceptional 3D chalk drawings on pavement, creating anamorphic illusions that come to life when viewed from the correct angle.
Step-by-step explanation:
Julian Beever is well-known for his work in a specific artistic medium: street art using chalk to create anamorphic or 3D pavement drawings that give an illusion of depth when viewed from a certain angle. Though the question seems to refer to a description that accurately fits the works of both Nathan Oliveira and Beverly Buchanan, when specifically addressing Julian Beever's medium, his celebrated accomplishment is in 3D chalk drawings on sidewalks, where his realistic, immersive art interacts with the public space. His work is a temporary yet impactful form of street art that has garnered international attention.