Apologies for no update last week, as I had to attend a wedding as a groomsman.
However, I can proudly announce that progress begun on a new animation scene! I've decided to skip the transition for now and just go straight into the fellatio (since that's what everyone wants anyway).
The tongue play inside of Mark's foreskin can be completed at a later date.
As for Part 4, it will consist of Silica giving fellatio from a front angle, showcasing three separate expressions (staring at the penis, staring up at Mark, and closed eyes). These will be easy to incorporate into the final movements of the animation, luckily.
The next step from here is now concocting the main motion of Silica's head and lips. Other body parts will follow the motions, such as her hair (which will probably be the biggest task).