There are two things I really find difficult when doing interiors. First, finding the right angle that shows as much as possible of the set without causing too much distortion. The other is lighting the entire room and providing the right mood for the scene.
Regarding the perspective I use 'vanishing-point' in the photoshop filter menu. A very useful application and I am always surprised how few people actually know about it. All illustrations were done about a year ago for a film called 'Unknown Identity' and there are more samples on my website if you are interested.
