(video contains the playlist, if you don't dig SA2, just skip to the end)
I came across this series, and it offers more than a great deal on 3D mapping of our favorite games; anyone aspiring to make a video game, not quite fan stuff... but obviously if you wanna make a 3d or 2.5D Castlevania game, this is a great place to start studying.
Funny enough, I was in a trade-in store talking about 3D games, and he said "in 3D games, the Camera is the most important aspect" After watching, he couldn't have been more true.