It depends on if the props are in the vein of life cast type silicon stand-in puppetry as they use in feature films, not a cheap sex doll prop. If they can keep increasing the budget on these things then better, photo realistic scaled props and rigged CG doubles can be used for all kinds of scenes that more closely match the Japanese monster hentai genre rather than just tentacle shaped dildos that don't have much movement and life to them.What sort of props would be required for the real-life equivalent of this?
There are some live-action Japanese videos of these that use prop nipples but they look fake and ugly as hell.
I’d imagine this may need mostly CGI to pull off nicely?