AKA W4PL. Released under the label Section 31. Party version released 2018-05-12. First Commodore Plus/4 demo that uses Bitfire trackloader by BSZ & bubis.
Not really a bump map, but that is the closest to it. This one uses spherical pattern/rotation instead of planar pattern and 2D displacement. The shading of the object is based on 512 reference normal vectors.