This story is written by Druillet, but the art is the real standout. That last panel is amazing and must have taken a very long time to produce. I like the comparison between the last panel and panel before it, which shows much the same shot with considerably less detail.

(Heavy Metal issue #16, July 1978 – Page 77 The Story of the Acrylic Magus and His Vibratory Pertubations by Bihannic and Druillet)