After Silent Hill 2, Team Silent created a new graphics engine in order to create Silent Hill 3. The reason being is to create environments that come alive such as bleeding walls, blur effects, burning embers throughout, and other nuances everywhere. They wanted the environments to "make" the game and really be a character itself in a sense. Because of this it truly succeeded. I remember reading about how extremely perfect the Silent Hill 2 engine looked graphically and every game magazine was so surprised and skeptical that TS was developing a new engine from scratch. They took and expensive risk and because of this risk, Silent Hill 3 became the most detailed and beautiful SH so far.
Now, most of you guys are confused about Silent Hill 4. The game BECAME a Silent Hill title in pre-production people! It's not like they changed it after they started creating it. It was while they were coming up with this "Room" idea in the pre-production "idea kick-around". Some of the TS members wanted to make this new series, but Konami wanted a sure thing. And since TS had 1 more game on their contract they thought it would be silly and risky to start a new series now. So TS made the decision to finish up the deal with a final PS2 Silent Hill entry. Thus, Silent Hill 4: The Room was born.
So the members of TS were split into 2 groups. One worked on 3 and the other worked on 4 while the "key" members bounced back and forth. So truly, SH4 was worked on longer than the others. In some areas it shows such as the intricate story detail and great character models. It truly is an amazing game, but the changes are what makes it unable to live up to what makes a Silent Hill game. And because of these major changes is why it failed in the eyes of the fans.
I know for the third person view parts of 4 used the same engine as 3, but a new side engine was produced for the 1st person parts. Well, maybe not a new engine, but the existing definately was modded a bit.
Anyways, Silent Hill 3 is definately a beautiful game and hopefully 5 will continue to up the ante on becoming the most gorgeous Silent Hill game ever. Origins is one hell of a PSP beauty,
but because it is on the PSP which is slightly less than the PS2 power, it can only go so far before the line of the absolute limit is reached. But Climax (UK division) definately deserves props for turning Origins from the ugliest entry to actually competing with it's older siblings. Thank God, it is out of the hands of the LA dev branch because those guys can take there long-armed purple monsters and go f--- themselves!
I'm rambling now so I'll end this post because it's time I hit the sack. Peace!