Eye - Lighting Challenge

[migusan76]

Hi here is a piece I've been working on for a shading/lighting challenge over on cgtalk. I used zbrush's awesome projection master and zapp-link to do all the texturing and some tweaks to the base mesh provided in the challenge. any C&C welcomed, Thanks...

eyeFaceS.jpg

Higher Rez Version (http://www.digiteck3d.com/forum_images/workwip/eyeFaceL.jpg)

[calum5ZB]

Looks really great but the scalera fall oof to our left(eyeball white) seems to slice away?Apart from that Wow!!

cal

[Mr.Monster]

Stunning work!

~BW

[migusan76]

calum5ZB I think the shadowing on that part and the eye ball reflecting part of the nose does give it an odd appearance, Its bugged me as well.

Mr.Monster Thx's :D!

[KrakenCMT]

Looks really great but the scalera fall oof to our left(eyeball white) seems to slice away?Apart from that Wow!!

cal


Is that the reflection of the nose?

- Nice work BTW!

[migusan76]

thx's! Yea that peach toned reflection in the eye is the outerlayer of the eye reflecting the nose. which is correct since our eye is reflective but seems to look odd for some reason. The funny thing I looked at tons of eye shots and no matter what kind of light condition you rarely ever see your nose reflected in your eye. ODD!!

[marcus_civis]

thx's! Yea that peach toned reflection in the eye is the outerlayer of the eye reflecting the nose. which is correct since our eye is reflective but seems to look odd for some reason. The funny thing I looked at tons of eye shots and no matter what kind of light condition you rarely ever see your nose reflected in your eye. ODD!!

Good work!
It seems to me that two things are at work. First, the eye is only absolutely smooth over the iris and pupil, so at that point any reflection is broken by tiny veins etc. Secondly, wouldn't the depth of field that makes the corner of the eye out of focus also make the reflection fuzzy?

[migusan76]

Good work!
It seems to me that two things are at work. First, the eye is only absolutely smooth over the iris and pupil, so at that point any reflection is broken by tiny veins etc. Secondly, wouldn't the depth of field that makes the corner of the eye out of focus also make the reflection fuzzy?Thx's marcus! That is some great advise, at one point I did have a slight bump on the outerlayer and but from the photo's I looked at even close up shots you never see any bump on the eye. The only bump is inside the eye on the iris from the fibers but even then that bump is rare to notice in only certain kind of eye's, so I just threw out the bump all together on the outerlayer. The DOF wouldn't make it fuzzy since the eyeball is the center of focus. But that gave me an Idea maybe If I use blurry reflections on the outer area of the eye until it meets the iris it might look more natural!!!

[calum5ZB]

Woah congratulations on the top row!Now the nose reflection had been mentioned I realise why it looks that way.My only thoughts on solving the issue would be in postwork as you can hide the nose from reflections or lower the opacity of the reflective material?Anyroad,just wanted to say well done and sorry for the rushed spelling errors on my other post here.
Cal

[Scott Spencer]

VERY nice eye!!

I just went thru some hell trying to get eyes to render well so this really strikes a chord in me.

Really fantastic!

S

[crossbones]

Taron wrote a feature for messiah that actually renders out an eye procedurally as was Gollum's eyes in LOTR.

[migusan76]

calum5ZB - Thx's, I already have a fresnel ramp on the eye for the reflection and with that it still shows up. I figure next go around on the eyes would to just to combine the fresnel ramp with a painted texture of some to control the reflection better.

Scott - :D Thx's man, I really dig your work! Yea rendering eyes and skin for that matter are very challenging to do.

crossbones - for this eye I actually combined a technique where its procedurally done with textures and then I bake that out and combine it with some photo reference and do some painting to tweak it.

[marcus_civis]

I found this photo which is interesting because it clearly shows how the bulging cornea reflects like an inset sphere. The reflection of the nose can be clearly seen.

http://calexphoto.smugmug.com/photos/78231885-M.jpg

[migusan76]

That eye is a perfect example, The eye is so complex from its subsurface scattering to the odd manner of refraction / reflection inside. I've just come to the conclusion from now on that anything outside of the bulging cornea reflects very minmal to none.

[scott2600]

Nice Work Miguel!!!!!!

[WoodyLWG]

Fantastic stuff! My only nit-pick is that the shadows look a little too harsh to me. I think that a person reflected in the eye would not go amiss either.
If you think about it, you can't look into another's eyes without seeing yourself.


*Whoaaaa - deep.*

[migusan76]

:D thx's scott!!

WoodyLWG that is a true adding a person with a cam would have been a nice little detail to add. Yea the shadows from the lash's are a bit harsh since I was forced to use depth map and not raytraced.

[aminuts]

Sweet!!!

My only crit would be that for me anyways the eyeballs positions seems contrary to the way the nose and the rest of the face seem to be facing. but this is a close up and I really don't know what the situation the person is in and what is drawing their attention. It just seems off I guess...to me....probably not to any of the sane folks out there.

hahaha
;)

[rownd]

cool!!

[migusan76]

aminuts - :D I usually just look at it like this Iam sane and everyone else isn't LOL. But as for position Iam not quit sure what you mean, are you talking about the fov of the camera or about the model position itself.

[Freewaldo]

Just awsome work mate, it really looks like an eye. The veins are perfect. :D

[migusan76]

freewaldo - Thx's, here is the link to the contest http://forums.cgsociety.org/showthread.php?f=185&t=411452

[Elixir]

Hey there. Beautiful eye man. I agree with you about tha conclusion that the outer eye does not reflect very much at all.

I have a one Q's and one crit...and I only crit becuase I know you want feedback :)

I think the Cornea would buldge a little more than you have it right now. It seems a liitle flat.

Did you use a bump on the iris or simply a good reference image?

Congrats on top row. Well deserved. We are all commenting on your eye and forgetting that your skin is just beautiful..:tu::tu::tu::tu::tu:

[migusan76]

Hi Elixir, Thx's for the kind comments! I thought as well the cornea would bulge some but when I had it bulging it simply didn't look right, from the reference images I looked at the eye ball always looked pretty smooth straight on only from different angles can you tell that the cornea is bulging or at least that is what I came to see. Yea I did use some bump on the iris since when you get that close to the iris you start to see the fibers in the eye.

[Elixir]

I would love to see some wires :)

[migusan76]

Elixir here is the shade view of the mesh I ended up using, the wire is way to dense to just show the wire since I used the imported mesh from zbrush that I tweaked.

shadeShot.jpg

[migusan76]

Here is one mesh I start to experiment with to bring out the skin features but in the end I just used the bump map to bring those fine details.

dispShadeShot.jpg

[Freewaldo]

freewaldo - Thx's, here is the link to the contest http://forums.cgsociety.org/showthread.php?f=185&t=411452Thanks mate, your about the best one in the contest.

good work :D

[ShadowM8]

Nice work on the eye, one of the better ones I've seen in this challange!
Good to see you put my mesh to good use.

[migusan76]

:D Thx's for the kind words. But it is I who should be thanking you for providing a nice mesh to work with for the contest!!!

[neuromancer2]

First off, amazing job on the skin shader, it looks so damn real! By any chance can we get our hands on that suhweet skin shader you wrote and maybe a tutorial on the eyelashes? I plan on using Shave and a Haircut for the first time on a model I'm doing right now.
The only things I've noticed is that there is no transition from the Sclera to the Cornea, from white to transparent, it's too sharp. This contributes to the eye looking somewhat flat. Not sure how you set up the eye but this is achieved by using a simple ramp.
The other thing that makes it look flat is there seems to be no refraction from the Cornea. Even looking at it straight on you should be able to see refraction, the Iris bulging just a bit. Try a before and after and you will see a huge difference. I believe the refraction should be set at 1.38
The last tiny tiny detail would be putting a slight bump on the eye itself and maybe a bit more on the veins. The eye is covered with a thin layer of liquid/fluid and would'nt be completely smooth. I think this would help that reflection of the nose as well. It's too sharp.
Just a few minor adjustments and this would have to be the most realistic close-up of a human eye I've ever seen. Hope I didn't sound too nit picky.

[migusan76]

Thx's neuromancer2, I plan on releasing the shader for maya software/mental-ray renderer. The shader itself is ready to go, I just need to find time to finish the documentation for it. As far as the lashes nothing really special just taking some poly mesh eyelashs and telling shave to convert to hair splines, mostly the biggest thing with hair or eyelashs will be the hair shader your using on it that will give it that end realism. I completely agree with the comments you made, sometime ago I actually went back and fixed a few of the issues. I just never posted up the never results here. But here is updated version of the eye.

eyeLightShade.jpg

[skinnybonez]

amazing!

[JesseGraffam]

looks good, but the eye needs more veins. But don't go crazy and make it look bloodshot. Also I think the lashes are too thick. Thin the hairs out a bit, and also less lash density.

[neuromancer2]

Can't wait to try out the shader! The updates look great. The only thing that doesn't look quite right is you thickened up the lashes a bit, the top is fine but the bottom lashes are usually thinned out, not as dense as the top. Still an excellent job.