Have you seen this picture before?
Supposedly it’s a wallpaper for Duke Nukem Forever from a long time ago. The model for Cycloid Emperor is clearly the original created by Chuck Jones and used for making the sprites for Duke 3D. However the one for Duke is from the N64 version, including the SPAS-12 instead of the regular shotgun.
And there is the question of why they would have used material from one of the console ports instead of the original. Perhaps they considered it the most advanced rendering for Duke at the time?