Tension Engine is a geometry nodes setup designed to simulate surface tension where water intersects with other objects. By applying a modifier to a water mesh and selecting a target object or collection as a collider, the system generates the small reflective ridges typically seen at the waterline. Additionally, the tool includes a dynamic water material equipped with caustics, displacement, and rain effects. A procedural wetness and darkening node is also provided to help blend objects realistically into the water surface.