These are high resolutions, originally rendered at 10000×4225, testing out the VRay fog feature in 3dsmax. When combined with 3D procedural textures, truly unique results can be achieved. VRay fog offers many useful variables including density settings that allow the fog to become more solid, as well as falloff controls that allow the fog to realistically fall off the gizmo edges.
Although VRay Fog is not necessarily suitable for an effective cloud rendering solution, it provides a ton of flexibility for numerous applications.
Directed and created by Richard Rosenman.