Great work, I like the colours and misty atmosphere of the top piece and the look of the shadows being cast in the bottom one. There's also something dark and gloomy about the piece in the middle that just works .
Wow, these look great! The lighting's very dramatic, and I love the rock textures on the last one. Unfortunately I never played FF7, so I don't know what places this is based on, but these would be really cool environments for any video game.