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Iray Eye reflections. Help, tips and settings please.

MusicplayerMusicplayer Posts: 515
edited April 2015 in The Commons

Hi Folks,

I have been spending days moving lights and adjusting eye surfaces and do not appear to have got it quite right.

The general consensus seems to say just add the Water-Thin Iray shader to the Cornea, Eye Reflection and Tear surfaces and then render.
This has not produced the amazing eye reflections I have seen in some other renders, so possibly there is more to this process.

I would appreciate any settings and examples people have used to get good eye reflections.

My render is lit with an HDRI with camera headlamp left on. I did increase the eye textures Refraction Index from 1.33 to 1.36 and I then noticed the eyes have picked up the camera headlamp.

Thanks. :-)

With credit for use of free HDRI called Basketball Court available from http://www.hdrlabs.com/sibl/archive.html

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Post edited by Musicplayer on

Comments

  • KhoryKhory Posts: 3,854
    edited December 1969

    Be sure that the cornea has no textures on it when you set it to water thin. Change the morph on the cornea to 1. Big hightlights in the eye will only happen where there is a fair bit of light reflected by the eye. The sort of highlights you see on a tv show are produced by the big lights/reflectors that they use for filming. If you want larger highlights you could add a photometric spot and then change it to one of the shapes in order to have that reflect able by the eye.

  • 8eos88eos8 Posts: 170
    edited December 1969

    The cornea refraction index should be 1.376, according to Wikipedia. Eye reflection and Tear should stay at 1.333 which is the IOR of water.

    It also works to disable the eye reflection surface (set its cutout opacity to 0) and turn on Top Coat for cornea, sclera, and lacrimals.

  • MusicplayerMusicplayer Posts: 515
    edited December 1969

    Thank you Khory and 8eos8 for your replies. I will try the settings you recommend.

    :-)

  • Oso3DOso3D Posts: 15,047
    edited December 1969

    Also, when you apply thin water it changes base color to gray. I think it works better if you change it to white.

  • MusicplayerMusicplayer Posts: 515
    edited December 1969

    timmins.william said:
    Also, when you apply thin water it changes base color to gray. I think it works better if you change it to white.

    Thanks, will try this tip. :-)

  • MusicplayerMusicplayer Posts: 515
    edited December 1969

    Having tried the above recommendations, the eyes do now look a lot more "alive" than in my previous renders. I just need to play around with the lighting to get reflected images. A work in progress. :-)

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  • MariaTortilliaMariaTortillia Posts: 47
    edited December 1969

    I have been playing with the eye reflection and skin for a day or two , This render is my best yet with the kind of refelection I want. I used the settings suggested by SickleYield in her video tutorial here https://www.youtube.com/watch?v=FlHPadSm8aA, ie: setting cornea eye-ref and tear to thin water etc.
    To get a better reflection on the eye I set up a mesh light in front of the figure made from a cylinder end on (with iray base shader applied,lumicence set to 2000) to give the round reflection you can see

    erin_04b.png
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