https://krynski.gumroad.com/
yup, I've decided to finally release a tutorial! :)
you can get it here: https://www.artstation.com/a/32291638 or https://krynski.gumroad.com/l/cgxjqg
10 hours of narrated content, going through the whole process, from sketching out comps and ideas, to creating assets/texturing, mixing in scans, to building (and optimizing!) huge and detailed scenes in Blender, and wrapping it up at the end with Blender Real-Time Compositor (for post processing :)