Don't be silly, you need Steam for ANY Steam game mod...(HL2/SDK Base 2007 in this case)
But yea, even I'll be downloading the 3.??~5.?? GBs of the mod with my ****ty 512 kbps connection in release day!
Forgive me, I misread a previous post on the thread which led me to believe the game was based on a different engine. Hence the confusion.
Right, then. This means that normal and specular maps, postprocessing, and shadows are, for the SCP, cosmetic at best. So are cockpits and support for .ogg cutscenes. Because those things don't impact gameplay, right? 
The AI used in Black Mesa has been revamped to expand upon that of the legacy GoldSrc (HL1) AI used for the soldiers, which--essentially--makes them not easy to fight. The physics introduced by using the Source engine now allow for new puzzles that weren't present in HL1, which I guarantee you'll see in action in YouTube playthroughs within the next week. I could name off features all day.
You're the only one here suggesting that comparing Black Mesa to the SCP is a disservice one or the other. I'm sorry, but that's just all there is to it.
The examples you originally listed were all cosmetic and not related to game play so it's a little underhanded when you turn around and criticize me for examples you never stated in the first place. My criticisms were valid given the information you provided, if the information was incomplete that's your fault not mine. It's also misleading of you to selectively choose SCP examples that are all cosmetic while at the same ignoring the many other gameplay-related additions just for the sake of your argument.
That's sigtau's point. Akalabeth says the SCP doesn't do cosmetic features, yet that's exactly what those are.
Please read my posts a little more carefully. At no point did I say the SCP doesn't do cosmetic features, what I said is that the SCP has done MORE than cosmetic features, they've done a lot to expand game play. So when sigtau lists a bunch of cosmetic features of BMesa and compares that work to the work of the SCP then yes it is a disservice.
I am really struggling to understand you here Akalabeth Angel.
on one hand you have made 3000+ posts in non GD threads on a forum built around taking games that were commercially produced and improving the graphics, fixing and adding new functionality to the game engines along with adding our own spin to the ideas and themes involved.
then on the other hand you are complaining that a team has build a mod improving in their eyes on a commercial game because they are wasting their time.
Actually most of what I'm doing is responding to people who apparently can't respect my opinion.
But if it helps to understand me better here's a simple fact
I've never played FSPort, and I never will.
I've never played FS2 with the FSOpen or the MVPs, and I never will.
But I appreciate FSPort and the MVPs (and SCP) because their work has carried over into other mods like Derelict, Inferno, Silent Thread Reborn, Blue Planet, Procyon Insurgency, Flames of War, etcetera.
So if people enjoy Black Mesa great, but personally I would much prefer a mod with a new story, new enemies, new hero, new environment, etcetera. And if the work that went into Black Mesa happens to be used in a mod that provides that new experience then I'll appreciate it then. Until then if i want to play HL1 I'll play HL1 (just like I'll play Halo 1 instead of Halo Anniversary).
Well, this has certainly turned into an interesting thread.
Akalabeth Angel, if this is a mod you see no point for and you don't seem to want to be a supporting member for it, then why are you still here talking about it? Especially given that it hasn't been released yet, nobody really has any room to say anything about it other than "those are some pretty screen shots" or "wow, that took a long time didn't it?".
I'm just defending and discussing my opinion. The sooner people stop caring what I think the sooner I leave the discussion. But when every post is a criticism of my point of view (or worse) then yes I'm inclined to continue.
Though at this point I think I've said all that needs be said.