I'm an Artist of all fields of art I also do adult content, and I also, am making a manga/ anime series, a video game series, dubstep, and if you want to support me please do so here and on my Patreon at patreon.com/Quoduto
I have been introduced to this cool in the works program that functions like mmd but uses unity for better lighting and what not it also Adds missing bones to models so they can fit any motion without the need for editing and this program not only works for MMD models oh no It also lets XNALARA models it also has VR support as well so have fun!!!!
In short Its a work in progress but it's free and open source so what's to lose!
See it in action
https://youtu.be/Ny7G_jGOQnI
Grab it here
https://github.com/alloystorm/dvvr
I plan on making Animations with it mmd and Making Vmd files for it in the future so have fun