Switch Between Photos with Dialog

Someone I'm working with came up with a solution and I wanted to share what they did:

There may be one state more than needed for Abby, but I created a non-animated state and used that for initial state on both the slide with the button and the dialogue slide. I just used a clean version of the Raymond image on the slide with the button.

Next slide starts with the full color image as the Normal state for Abby. I created a green version on the timeline with a .5 fade intro and .5 fade exit animation then cut and pasted that image on top of the normal version for the Green state, then did the same thing with the full color state (made a version on the timeline with animations and cut and pasted as a new state - Full Color).

For Raymond I did something similar, starting with a green washed normal state, but added another state that was Green with the animations so it would transition smoothly on the start of the slide. And then added another regular color version on the timeline, added the animations (.5 Fade on, .5 Fade off) and cut and pasted that over the green washed normal image to create the Full Color state. Then just set the triggers to alternate like it was set up already.

 I've attached the slides for you to see. It seems to be working okay. 

Thank you again for all your help.