The shorelines were likely rendered by in-house fluid dynamics simulation, and, likewise, the surface structures of the stones, sand and barks likely use in-hou

The shorelines were likely rendered by in-house fluid dynamics simulation, and, likewise, the surface structures of the stones, sand and barks likely use in-house shaders which are far more advanced than what's implemented in non-commercial, non-in-house renderers. The Pbrt render also lacks aerial perspective: https://en.wikipedia.org/wiki/Aerial_perspective https://en.wikipedia.org/wiki/Aerial_perspective