Mocha remove and replace object

Hi, please can anyone tell if mocha remove and replace object would work in a situation like replacing eyes…What i mean is, the head turns from looking left to looking straight forward and then looking to the right. Just want to know if the replace function would work here or am i restricted to creating a mask around the eye and using that as a matte in AE for the replacement?
Just to be in the clear i’m working on a movie that requires the eyes of a character to turn black (like u have in supernatural) but i’d love to do it without the daunting task of frame by frame roto work

Hi there,
The insert tool is better for that sort of thing than remove. You will need a rock solid track. Please see our insert videos on for a walkthrough on our insert tool!
Let me know if you have any questions!