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.
Lyran is a different person from Louis is a different person from Enayla is a different person from RenSims.
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.
Happy simming!