I usually don't post here anymore, but since it looks like the OP has gotten some, um, confusing information, I thought I should step in and clear things up a bit.
![Smiley](/smf/Smileys/default/smiley.gif)
Lyran is a different person from Louis is a different person from Enayla is a different person from RenSims.
![Smiley](/smf/Smileys/default/smiley.gif)
Unless I've totally missed something, none of these people have collaborated on any skins.
All skin makers include nipples on the female teens/adults/elders, and should all be google-able by name.
Lyran makes very nice skins that are matte and have the 'cartoony' feel of Maxis skins, but with a nicer tone and shading. She also has a skin paler than the default pale, a pale skin with freckles, and a dark skin darker than the default darkest.
RenSim makes skins that are a bit more realistic than Lyran's, but still fairly stylized. The textures are very smooth and nice and s/he also has a pale and very dark skin. You will have to donate to get the complete set of defaults, although it's only $2 and then I think you are eligable for donation gifts forever. Do note that they are anatomically correct.
Louis makes still more realistic skins, still rather matte but with a bit of a shine on some parts. Features are defined better than on Maxis skins, and there is a wider range of colours. I suggest the Lin edition on ShinySims.
Finally, Enayla at MTS2 has a couple of sets of skins available. Her skins are fairly realistic but somewhat ethereal. The first set of defaults she made are extremely glow-y, but the second set is much better. These have somewhat of a glow (NOT a shine; the skins do not look wet) but it works fine with the ingame lighting, and is fairly realistic since humans don't actually have flat matte skin, magazine models nonwithstanding.
![Cheesy](/smf/Smileys/default/cheesy.gif)
Happy simming!