I looked at controlling contours using Electroactive Polymers but have backed off due to the high voltage requirements. I'm looking to be able to use the concept below to adjust gradients of a surface to make hills or valleys. I was hoping through using small metal rods and applying a certain amount of voltage, I could use an arduino or similar to program a scheme to adjust heights of pins. Maybe there is an easy, more affordable way but this is what I'm looking at for now. See the picture below.
