Eye tex trouble

[fallen21]

Hello,

Since the beginning i've some trouble with eyes textures, see the file attached for a better view.
So if you noticed eyes are not clear, and i would like to have eyes in Octane like i've did before in Poser.
Or maybe i haven't let enough render time (26 minutes, 12k/12k) & so there is some tips to quick the render time of this part or anything that can improve this part ?

Thanks in advance .

[face_off]

Which figure are you using?

The "dark eye" issue is caused by the specular eye covering vertices being in the exact same position as the eye surface vertices. It can be address by moving the eye covering away from the eyeball surface, decreasing rayepsilon, using PMC and reduce direct_light_importance. But there are some other fixes for particular figures.

Paul

[fallen21]

I mainly work with V4 & i'm using Pathtracing for my renders.

[badmilk69]

I use to hide (opacity=0) EyeSurface mesh.

[fallen21]

Yes but Opacity = 0 mean 0 reflections & i want to keep the reflections for more realism .

Ray-epsilon reduce a bit the effect but nothing significant in Pathtracing.

[mlru]

I usually

• hide the surface
• use specular on the cornea and pupil (IOR for Cornea = 1.38, Pupil = 1.41)
• glossy for the sclera (with little roughness and SSS)
• and diffuse for the iris

And of course you'll need something the eyes can reflect, a light and/or a HDRI

[face_off]

On V4 there are a number of different approaches...but my preferred setup is....

5_Cornea - change to specular, transmission 1, opacity 1. Optionally set bump = turbulence (scale 10, power 0.01)
7_EyeSurface - opacity 0.

This setup gets all your reflections from the cornea (there are none from the non-cornea area, but not really noticeable (since the eyeball is white anyway). If you want reflections on the eyewhite too, simple convert the 5_Sclera from "diffuse" to "glossy".

Paul

[fallen21]

I've found (with your help) a good settings for one type of eyes textures.
Sclera no need to touch it seems to be already with "right" settings.
Cornea (already in specular) change in glossy, added bump turbulence, change the diffuse color (white).
Like this my eyes looks "better" .

[Witpapier]

I found that by siply changing the Eye surface only gets a nice result too. Eye surface = Specular. Reflection 1. Transmission 1. Index 8. Bump 0. Normal 0. Opacity 0.25 smooth enabled. roughness 0. playing around with the opacity seems to get the perfect result everytime

That gives me quite a good reflection.

[face_off]

They look good Witpapier. Maybe reduce the reflections a touch, and add a turbulence to the bump map (settings given previously in this thread) to make the eyes look a little watery.

Paul