Room of tranquility (left): effects - antialiasing, texture mapping, and soft shadow
feel - I added two yellow lights to give the warm feel to the room.

Stonehenge (mid): effects - antialiasing, texture mapping, and soft shadow
feel - Yellow light is used to give the illusion of the setting sun in the background.

Waterworld (right): effects - antialiasing, texture mapping, and glossy reflection
feel - Skyblue light is used to give the "clean" feel to the environment.
The floor texture is actually metal, but it gives an illusion of water
plus the effect of glossy reflection