Previously worked on a intro for a mold company. I used a photo of a A/C duct and processed it so that the camera could slowly advance into the duct, even though it was just a picture. I color graded the duct to be dark and foreboding and then created particle dust to fly around. Finally, I created textured text to fly into the camera as if flying through the duct work. The client loved it.
Just finished a composite shot of a Harry Potter-like intro with titles using tons of cloud layers, animated lights, color grading and Boris FX animated text.
Came out great.