One of the Three-Moon fleets harvesting Aclyx substance from the mud ocean. The first filtering step is done on the ship with excess gases burnt on the move. Once spherical containers are filled they are flown to the main refinery plant for the final stages of extraction.
The harvester ship block out done in Maya, everything else - 3D Coat, and then put together in Keyshot. The whole scene was about 3+ billion triangles but Keyshot didn't even cough on that.
Fotoref's mud photopack has been my main reference for the mountains - https://www.fotoref.com/products/mud-pools