Hasta La Motion!

I have been playing around with geometry deformation in Nuke, and came across the LookupGeo node. It gives me exactly the result I want to achive which is a stretched out room, but unfortunately it doesn’t seem to be able to animate the distortion over time.

Is there a way that I am somehow missing?

I have been able to achieve roundabout the desired effect using the TransformGeo node. But it is a linear scale in the Z. I would like to have a falloff type of effect, with the front of the room being less affected that the wall at the end. Would bicubics be my only real option?

Many thanks.