I'm trying to find a way to make a surface (or object) that sort of "reacts" to touch/collision by emitting glowing light around that touched area. Best example would be the scenes in James Camerons "Avatar" where they run through the forrests full of reactive bioluminescenting plants. Basically I need it for an architectural project where I want to add that pressure sensitive light emission feature to stair surfaces to make them interactive and more attractive for the employees to use. Need to make an animation of that under the bottom line. Ideas anyone? Keyframing when touched seems to be a bit unauthentic/ineffective.