This is a 3D model for dual extrusion machines. You will found 2 .STL files, one for each extruder. For print this model you DON'T need any support structure!
The Moai on the photos has been printed with the BCN3D Sigma (https://www.youtube.com/watch?v=q7UxQWz5Nm8). The first one was printed with Woodfill and Corkfill and the second one was printed by BCN3D and was made of Cooperfill and Bronzefill.
"Moai are monolithic human figures carved by the Rapa Nui people on Easter Island in eastern Polynesia between the years 1250 and 1500 CE."