Experiments with volumetric scattering in Toolbag 4.
The blobby geo was modelled in 3DSMax and exported to Toolbag for raytraced rendering. The volume fog was rendered in raster mode and composited in Premiere.
Final comp (raytraced + raster)
Raster fog pass
Sunset lighting look dev
Stormy lighting look dev
Early look dev
Cloud tunnel geom
Alternative look dev (Toolbag + Photoshop)