Anna rig is compliant with Maya 2018, rendered with Arnold.
To use the rig it's necessary to install mGear for Maya:
There are two main groups in the scene: SET and CHAR. SET includes the lighting, backgrounds and props objects while the character objects are in the CHAR group.
The objects are also grouped in layers: rig, mesh, clothes...
Change the scale of the character by scaling the global_C0_ctl controller.
Change the haircut by accessing the faceUI_C0_ctl:
The arms/legs roundness is an attribute accessible by clicking the arms/leg UI controller:
The body polygons under the clothes are hidden in the viewport. They are tagged as invisible faces. To reveal them, select the body object and go to Display > Polygons > Invisible Faces. Additionally, opacity maps are used to hide them when rendering with Arnold. Disable the opacity maps to reveals them.