Is it possible to add a groping hand in the character studio, similar to normal gameplay? I've been playing around with it, and it seems like there's a lot of possibilities as long as your willing to tediously set things into position.
I've never actually messed with the LewdCrestX mod, but it looks like it's included in RX10. I'll have to play around with it at some point. Kplug has always been a good mod, in my opinion.
I don't think there is a separate hand like that, your best bet is to use a second character as the groper. Try seeing if individual parts can be turned invisible as well, I know there's an invisibility toggle on the whole body for sure.
Yes, LewdCrestX is included as an optional mod and has been since at least RX9. It seems like a good mod, but it does run into the issue of being complicated to figure out and, unlike Kplug, there is no documentation of its functions and controls. While there are descriptions in game for the functional crests, the issue is those descriptions aren't very helpful. I had to actually go over to the Discord to ask what the command crest did because its description was so freaking vague, turns out it basically makes the girl unable to say no, which means you could even have an H scene in the very first interaction. It's a great way to see a girl's dialogue for when she accepts an H scene request without being your lover first since they typically ask to be lovers long before they ask for sex unless something is done to keep them from asking to be your lover first, like asking them for sex with the command crest.
Kplug is definitely a great mod, I just wish Katarsys would put some more functions into the game that could replace some of the functions from mods he listed as having issues. Example, giving futa mode the ability to walk into the locker room, shower room, and girls' bathrooms. I've been talking to him, so we'll see if maybe I can get that added by him.