This is the current list of things I have in mind, but can't make promises on all of them. some ideas from SDT mods:
I already mentioned some of these in the 2.2 update post for creampies, but I'll list them here too.
- More positions
- More emotions/moods control
- Adjustable Throat/Abdominal bulge
- Adjustable/dynamic throat/penetration resistance
- Adjustable squeeze factor on the penis when inside holes
- Cheek bulge/puff
- Seeing cum inside holes
- Inflation
- Other body part cum catching (Imagine being able to select a hand and she will move her hand to catch jizz or perhaps spit/drool cum onto the specified part)
- Handjob
- Balls play (like hands playing with balls)
- Balls sucking
- Tit fucking
- Masturbation (for the guy and girl)
- X-Ray
- Audio and Dialogue stuff (I've done a blowjob audio and text box dialogue mod for a similar game before
here
- Butt size customization
- Horse cock (might not be for everyone, but it is actually quite popular from what I'm seeing)
- Penis twitching/precum generation (as an addition to my erection system)
- Drool/spit customization
- Swallowing customization (I'm planning on seeing what I can do about this soon)
- Tongue length (Found it pretty far into my search so might not be popular but I think it's worth noting)
Edit, some more ideas, some from people in thread, some of my own:
- Ahegao/Blush effect (in relation to more emotions)
- Girl/Guy POV
- Adjustable mascara smearing
- Adjustable wetness
- Sweating
- Attempt to make a variant of the wetness effect that looks more like proper cum smears, probably could do like a white mascara smear or something
- Have cum smears become more dry over time, bear in mind the cum smears are different from the actual cum particles
- Misty looking particles and heat haze warbles to depict smells, like the scent of musk, sweat, and cum