Further tests of the slider widget with some new materials.
Grab the arrow in the center and pull each image left or right to reveal it.
a test map on Dixon Landing Road in Milpitas, extreme zoom into the North East corner where the Ped Crossings meet
A large more complex map at the same location:
Or this way: This style seems to be the keeper !
Or this way:
A Bad Example
These images are not aligned in size, so this will not work without building up key-frames for each of them then to have a common size and offset.
On the whole, this seems to work now.