I don't think it's the shaders. I think it's simply the 3d model scene prop that got animated. Ask around the Q&A thread about animating scene props. Or try something as simple as the map icon animation though I think it's different (the trees on the big map are easy to do, and the animation lenght time for each frame you'll have to do it by trial and error - look at the party map icons for hero, lords, bandits and caravans).