As mentioned before, the characters in the first one are floating. They should actually be sunk into the couch just a bit. Also, "his" right arm is intersecting with the pillow against which he's leaning. Easy to do when working in the Daz viewport. Flipping your viewport over to the iRay view before you kick off the full render can help you find this kind of thing. I also find the lighting a bit washed out - if you strengthened the lighting that's coming from the right, so that the shadows were a bit more pronounced, I think it would improve it somewhat. Shadows abound in the real world - when they're not there in CGI, things look wrong, but we usually can't identify exactly why.
I like the lighting a lot more in the second one - it's much more "real world" looking. Note how the hair shadows the face, parts of the arm are lit and part are shadowed, and the shape of her cleavage is emphasized. That's what shadows do for you - your eye turns them into "shape."
Regarding the pants "poke through," there are two ways to help fix it:
- Add a "push modifier" to the pants, and set it to about 0.1 or 0.2
- Add a "smoothing modifier", or if there's one already there, dial up the collision iterations a bit.
I tend to use the former technique a lot - it helps a ton. If you need instructions on how to do that, I'm happy to oblige.
Also, on the second one, it looks like the towel is intersecting with her left breast.
On the third one, again I think you need some adjustments to the lighting on the figures to make them "pop" a bit more - separate them from the background and, again, cast some shadows. A key light would help a lot, I think. I'd also move the characters a bit more to the center unless something was supposed to be happening to the right. Not dead center - there's a classic "1/3 of the way in" composition rule, but right now the center of focus (his dick) is about 1/4 of the way in, which feels too far left.
Hanging hair is really hard with Daz figures of, of course, so there's not much you can do there unless you experiment with dForce a bit. Assuming it will work on that hair. There are discussions on doing this on the Daz forums - for some of the hairs people are getting pretty decent results. In others, well, it's good for a laugh.
Finally, in #3, it seems like her knees should be a bit more bent (at least the left one) - in her current position, she's really close to being pulled off the ring. Other than that, the character poses are pretty good. Also, if you want to be REALLY picky, her breasts should be sagging downward a bit - a touch of "up" breast morph. Even implants are subject to gravity. But one can easily forgive that bit of non-realisticness as "artistic license." LOL
Please don't think I'm trying to tear you to shreds - they're pretty well composed, so we're dealing with the kind of subtle tuning that can take them to the next level.
Keep at it. And tell me where I can find girl #3 - I want to meet her!!!
