http://forums.blackmesasource.com/showthread.php?t=17088
I just thing this whole situation is a bit weird and interesting, there's 2 really noteworthy things about this. Valve is awesome of allowing this game to be made, given away for free, and also sold on their store. Now here's the interesting part;
We aren't taking features away from the free version. The free version of the game has been ported to Source 2013. Right now, that version is functionally equivalent to the released version of Black Mesa we released a year ago. When we got on greenlight, we were forced to move to another engine. Right now, we can't tell you what that engine is due to our licensing agreement. Being on this new engine allows us to change how the engine works, modify tools, etc; things we plain and simply cannot do for the free version. I plan to open source the black mesa code for the free version. I also want the paid version to be open source (only client and server, nothing else) but we need to talk to VALVe about that. We want both versions of the game to be as moddable as possible. I don't have a timetable on that part just yet.
They were forced to use another engine, and the game is already running and ready to be released using it, I'm guessing the new engine might be a new version of Source...
But who knows, we'll see soon.
EDIT: Not Source 2
Just to dispel a large rumor (and I know I'll be viewed as the grinch that stole christmas): We are NOT on Source 2. It wouldn't make sense for a company to license tech they haven't proven yet with a released title to a mod team. Our visial however, WILL be improved.
Still it'll be cool to see if it looks any better, it was already a good looking game. Still there must be a reason why they cannot say what engine it is...
Replies
The whole engine change is very weird and cryptic as well, "being forced" etc. Valve would be happy to license source to any developer for payment or another percentage cut.
They have also had MANY contributors over they years, they would have issues selling this thing unless they remade all the assets, which would also be weird if they don't have any money to hire the manpower to make them to begin with, or did contributors sign over all rights over the years?
They do mention improved visuals though, is this just tech or also new assets?
also, this little gem on the forum:
It could be something similar though. Maybe an engine overhaul in preparation for the Steam console deally or some such thing.
It sounds like they have to move to a different engine in order to have the game on the steam store, it's not just because they wanted to switch. Though a new engine could make lighting and assets look better, they did say they were limited by a lot of things in source.
ya true, that would also give them the opportunity to play with a different kinda rendering too, or maybe implementing dynamic lights if they had full source code. So that could be the improved visuals they are talking about.