"mainly depict" is correct and usable in written English.
You can use it to refer to something that is mostly presented or represented in a particular way. For example, "The paintings in the gallery mainly depict scenes from rural life."
Important features are carvings on rock walls which mainly depict ships, animals, and fish.
The photographs mainly depict black men with hideously elongated necks, swinging sometimes in threes and fours at the end of ropes tied to light poles, trees or gallows.
As the purpose of the sculptures was to preach and instruct, they mainly depict scenes and figures from the Old and New Testaments.
Although there are many works about special matrices and their norms, we can mainly depict the following ones since they will be needed for our results.
Jains mainly depict tirthankara or other important people in a seated or standing meditative posture.
Positive pictures represent mainly human and animal babies and nature scenery, whereas neutral pictures mainly depict inanimate objects.
In addition to drawings in the text (most of them borrowed from other works), there are several colour plates of representative taxa, albeit mainly depicting shells, there being virtually no living animals illustrated.
A photographic history by three generations of photographers (Slim Aarons, John Swope, Juergen Teller) of a chic 1960s resort tucked into the cliffs along the Tuscan coast in Porto Ercole, "Hotel Il Pellicano" mainly depicts a particular set of bronzed and contented Italians, often titled or well-born but certainly far from poor.
Section 3 mainly depicts the timetable optimization problems from different perspectives.
However, the film doesn't only depict Zidane's feet as he possesses the ball, but actually mainly depicts them when he in fact doesn't have the ball.
Seven medallions, mainly depicting early American coins, decorate the street-level facade.
