Black Mesa clearly seems to look better basically as its in the new engine ( but I note a couple of very small things are missing such as how you customise your player model in HL MP) - and it took a long time to make, so I am a bit confused why they have gone back to improve the original code but not port or not just improve Black Mesa. Sorry if I am out of the loop, I'm honestly just in the dark how the 2 product relate, reasoning wise.