Just a reminded, some male Ogryns do have guts, decided to use my posing app to try and give them a gut (and haven’t posted yet), and it’s about close to this image too XD
But you are right about Ogryns and Ogres being two completely different species, but their about as close as I could find to work with, and the part about using the app, you aren’t wrong, with an art program, you can trace and sketch over it as a point of reference, I did so on paper in the past.
This was something I put together, then drew onto a piece of paper, scanned, and cleaned up, this was when I was still using an iPhone 6 (the app was more buggy and would crash, it was better now on my latest phone), and with this app, I hope to make some epic 40K drawings, which ended up me morphing and creating a lot of model refences to work with XD