code: def autolight(scene):
      
  
      # create two default point lights
      lights = [PointLight(), PointLight()]
  
      # create two translation matrices for bounds corners
      transforms = [transformations.translation_matrix(b)
                    for b in scene.bounds]
  
      return lights, transforms
docs: Generate a list of lights for a scene that looks decent.
  
      Parameters
      --------------
      scene : trimesh.Scene
        Scene with geometry
  
      Returns
      --------------
      lights : [Light]
        List of light objects
      transforms : (len(lights), 4, 4) float
        Transformation matrices for light positions.