Hentai with the best visuals?

In my opinion it would have to be Front Innocent.

I doubt you'll have a whole lot of contest on that one... except maybe those opposed to glossy skin.

Front Innocent / Another Lady Innocent is one of the best animated 25 min I've seen from any genre.

almost anything that is adapted from a Eroge or a H-Doujin
-Sora no Iro, Mizu no Iro
-Honno no Haramase Tenkousei
etc..etc..

anything original sometimes sucks...

I'll say either Moonlight Lady, Words Worth or Bible Black, really-- content aside, their visuals are a wonder. :3

Look.

They're all adapted from a game, and they have nice graphics.

"Sora no Iro, Mizu no Iro" is definitely a contender for the non-glossy category. (although once again, why the hell did they make the dude such a toolbag?)

Most of the rest of the stuff listed has animation that's a little on the crude side. Not to say they're anything wrong with them, just anything made before 2004 or so automatically looks dated. Compare "Bible Black" or "Discipline" against "Cleavage" and you should see the difference I'm talking about.
Of course then again, visuals is an ambiguous term, so artistic direction can count for a lot.

I'll add "Wet Summer Days" and "Futari Ecchi" to the list of hentai that's especially well animated. Neither is the most fapworthy, but the animation is superb and they're the kind of things that are watchable without any H-Scenes.

Well, it's liscensed so I dislike handing that stuff out. It is fairly popular so if you do a search for it under the US name it shouldn't take too long to find.

If you're just wondering what it looks like, it's essentially 25min worth of animation where each frame is nearly as good looking as these CG stills.
https://www.fakku.net/viewtopic.php?t=20900

Bible Black and Cambrian, though the shitty ending to Cambrian spoils my enjoyment of it.

I didn't like Front innocent simply because personally I can't stand pubic hair. and I'm not a big fan of the big breasted hentai category so that leaves out bible black, discipline, etc.

my favorite hentai based on visuals should be... kimi no na wo yobeba

lol. i know i'm sick ^_^

The artwork in Yobeba was fine, it was the content that was messed up. Usually I just find rape gross and I'll pass over it- but that... I just don't get why they would create a character the viewer would empathize with, only to see her get hurt. Granted that probably made the final scene a little more intimate, but not enough to make me not wish the damn thing were tagged "rape" so I could ignore it entirely.

Milk junkies,hills have size,angelium,viper gts..Some 3d animation made by umareru-CMIW hehe

lol that's why i said I was sick right? but really I find rape a turn on in hentai but a turn off in real life.

I like your taste. Those three are definitely among my faves. Throw in Sora no Iro Mizu no Iro and Front Innocent as well. I also enjoyed Beat Angel Escalayer. Its scenes were probably not as good as the above mentioned but I find Escalayer totally hot.