I dunno I think it does take up MP.
As it involves electro-mechanical devices to simulate breathing, heart beat, circulatory system, skin, hair etc.
So yeah, I'm pretty sure it does take up mod points.
Also it's in the "mod" section and there is a mod point cost for it in the tables at the end of the book, so yeah it takes up mod points.
If you read the text description you will realize that the higher levels (above rating 2) are mostly inaccessible to normal folks and cannot be modded onto most anthro drones.
see below.
So absent a facility and the skills and time to custom mod an anthro drone you SOL.
Unless you buy an i-doll which specifically says it can be customized at the factory to be more realistic than it's default mod of realistic features 1.
As usual you must sift multiple entries throughout the book to make sense of what is possible when it should have all been written nicely and concisely in the entry for Realistic Features.
"While many drones can be made realistic (receiving Rating 1), allowing them to pass at a casual glance at a distance or at night, wheels, quad fans, and so on are quite dif cult to disguise. Most drones cannot be given Realistic Features beyond Rating 1, while some cannot even obtain that level. (The gamemaster is the nal arbi- trator on what is and isn’t appropriate.) Realistic Features 2 can be added with a Shop, but higher than this requires a Facility (most drones this realistic are designed as such before being sold)."
does Realistic Features take up MP?
It is not documented to. In my mind, it's basically a full-conversion new model of the drone, so it doesn't take any MP because it's functionally redoing everything about the drone.