I liked Sledge, and it's an amazing amount of work you put into it, but I found some of the differences between it and the 3.5 Hammer to be really annoying, after 13 years of working with it.
I don't know if you'll work on it anymore Penguinboy, but if you do, here are some suggestions I'd have:
- Make the camera turning speed in Mouse view adjustable. For me it feels too sluggish.
- The jump distance with the mouse wheel scroll is too big. I think this could use being adjustable as well.
- I'm kind of a speed mapper, so I really preferred when closing an entity dialog box would also apply my changes automatically. With Sledge I keep forgetting to click Apply, and even then I find it to be kinda slow. Maybe you could make it optional to have it apply modifications like in the original?
I understand if you don't want to work on it anymore. Pretty much everyone seems to be using Jackhammer now, which pushed Sledge aside. I don't use it myself, cause reasons. I just stuck with the old 3.5.
With Jackhammer and Sledge being around, I don't see why Valve would ever consider opensourcing Hammer 3.5. Considering they didn't put the boot into JackHammer yet, I guess they don't mind it/don't care even that much. Not only that, but there's probably a lot of underground Hammer versions flying about.
I have a talented friend who used the 2010something leak Hammer to make his own Hammer for GoldSrc. He never released it, because he didn't want any legal trouble from Valve.