The animation sequence shown in the Reddit post was created by Mardanium as a submission for Pwnisher's community challenge, Rampage Rally, hosted by 3D and VFX Artist Clinton Jones. Before, we showcased some of the creative works crafted for the challenge and spoke with Ted Heemskerk, the second-place winner of the competition, about the details of creating his work.
As for the Kuwahara node, it uses the Kuwahara filter algorithm to produce a distinctive painterly, brushstroke-like effect. Before, we covered the Kuwahara filter in more detail. For example, check out Round3d.pixel's watercolor-style scenes and Tong Ping Diary's compositing setup: