I want to make something like a 3d slideshow in maya...I want it to go from one photo to another, but I want the other photos to be hidden and appear only when the transition is to them...however if I try to hide let's say the first photo shown, also the keyframes that show this photo plane are deleted automatically!

Any help here? Please, even if you have even a simple idea, tell me, I'm going crazy in this! And I thought animation in Maya would be easier than in photoshop.