An insane project! It reminds me of the detail I had to put into Man on Fire from Metal Gear Solid 5. Also helps in the comparison with them being built on the same bases. I was very intimidated by this project at first, but I'm glad I took it on. In the end, it's one of my all-time favorites. And here's a shot with both Doomguys I did. The Doom Eternal and Classic designs.

Lower legs were from an Iron Man 2 Titanium Man. Sculpted up the boots, knees, upper legs, entire torso, collar, full gloves, shoulders, and the entirety of the head. Cut down a random sword, glued it on, then sculpted the rest around it. Shoulder cannon was from War Machine, heavily resculpted. It fit great on a dowel rod, so it has some side-to-side mobility. Full repaint, and all done!