Layers that can turn on and off so you can place a picture and remove the top layer and reveale the i. e. before and after, the night and day, this may be asociated to the view see sketchup animation tabs
This is like animation, yeah, and I think really cool. I will add it to our list for telling devos what users want.
Glad you like the idea
Here is a video we did with sketchup and Twilight
The accions are linked to the view not like other animation that has a separate secuence thats what makes it light weight and easy