Here is a similar approach using water droplets instead of a diffuse film, but they don't go as far as performing 3D reconstruction from the light field and the

Here is a similar approach using water droplets instead of a diffuse film, but they don't go as far as performing 3D reconstruction from the light field and the ray directions are not calibrated by a calibration pattern but by inferring a 3D model of the droplets: https://light.cs.uni-bonn.de/4d-imaging-through-spray-on-optics/ https://light.cs.uni-bonn.de/4d-imaging-through-spray-on-opt...