I want to move in my model -- phause and then have the 2nd floor disappear.
Is htere a way to do this and control reference files of the model OR
A way to freeze whee the timeline goes from one video to another smoothly?
Another option instead of clipping planes is if the elements are on a specific level you can use keyframes to slowly turn off element on that level.
Please see the following article:
The steps in the wiki article you referenced don't actually result in a smooth fading of elements. The wiki suggests that elements will fade in/out between the keyframes within a clip, but the won't. They will only fade between Clips in the Movie Editor tab.
The only way I have been able to achieve a smooth fade in/out of elements is with the following method.