You can watch full animation here:https://t.me/basementsaratov/4177

I tried to combine two types of animation, so far only like that. I hope I can make something better out of this idea later.
Overall, I'm definitely satisfied with the result: I made 3D to the background, rendered it manually into the staircase, slightly improved the fabric texture and discovered a new function in mocha.
I really tried to get this out to my limit. It turned out great, I'll add a few more things to the comments, and when I get home, I'll expand on it.