Affect3D has a large community creating 3d porn and a good amount of it is futa. Many of their videos are much longer than most animations you can find on the internet and good quality as well, they also have “games” like my personal favorite here Brittany Home Alone. It has a trailer in the link and the game works on android phones.
Non futa trailers here
I would recommend you check out Girlfriends 4Ever, Eralin and Meralin or some solo futa masturbation: Brittany’s Joy Ride from the last trailer here.
To find them click on this banner, click on animations -> animations -> full-length. There are more trailers you can watch there, but it would be better for me if you bought something 🙂