Deep Cave was modeled and textured in Cinema 4D. There is a base mesh for the cave that is put into a Hypernurbs to smooth it out. An Environment object is used to create some ambient lighting and atmosphere. 3DS and OBJ versions are available but will not carry through the fore mentioned elements - they will have to be added back in and the textures reapplied in your own software.
Please see the preview animation to view how this will look when rendered. A lens flare and motion blur effect was added in post.