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Eye Highlights?

DekeDeke Posts: 1,635
in New Users

I'm rendering a scene in daz 4.8 using Iray and the Timothy characters. Looks wonder but for the eyes.  Even when I apply the iray eye surface that came with the figure I don't see any wetness or highlights in the eyes.  Is there a good method to render more realistic eyes?

Comments

  • fred9803fred9803 Posts: 1,564

    You could possibly use an eye texture with a burnt-in reflection if that is the effect you need. Also consider that highlights are dependent on your scene and your lighting in that they need something to reflect in the first place.

  • DekeDeke Posts: 1,635

    So the highlights are not permanently attached to the eye...they are more of a shader setting that tells Iray how to render reflected lights in the scene?

    For some reason one of my eyes looks okay but the other is oddly glowing.

  • fred9803fred9803 Posts: 1,564

    I think most vendors have moved away from burnt-in specularity for hair and reflection for eyes, preferring these things to be produced more natually by the Iray environment.

    I had a look at a recent render and it seems that this is the case. The eye surface has a water layer that can produce realistic reflections, under the right circumstances of course.

     

     

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  • evilded777evilded777 Posts: 2,466
    edited January 2016

    Getting good eyes is a complicated subject.

    There are at least 3 eye surfaces to content with, and sometimes a 4th depending on the model.

    I don't have Timothy, so I can't speak to the materials that he comes with, but in general Genesis 2 figures can produce some pretty convincing eyes.

    What are you using for lights? Lights have a direct impact on how your eyes are going to turn out.

    Is there something "there" for the eyes to reflect? Either from an HDRI image or from actual 3D models?

    Have you turned up the Corneal Bulge morph?

     

    Post edited by evilded777 on
  • SpottedKittySpottedKitty Posts: 7,232

    Something else to consider, are the lights in your scene in the right place to reflect off the eye surfaces into your camera? Sometimes I can get this to work right away, sometimes I need to poke and prod at things.

  • JohannaJohanna Posts: 119
    edited January 2016

    A photometric spotlight - very small disc (outside) or rectangle (inside rooms) - parented to the head of your figur - directed to the eyes gives a nice pointed highlight reflection to your eyes, no matter how you move the figure.

    Give the emitter (spotlight) a proper distance and intensity so only a very few of the light hits the eye but gives a visible, burned out reflection.

    This small light, pointed directly to the eyes also adds some sharpness / contrast effect to the nice structures of the Iris.

    Post edited by Johanna on
  • tirenzi3dtirenzi3d Posts: 46

    Do not forget the materials. You need a normal map or bump map to break down the highlight. This way the detail of the eyes come out beautifully and it gives a much deeper effect.

  • mjc1016mjc1016 Posts: 15,001

    And don't forget to work in some corneal bulge...the coreneas on these models are 'flat' so for the best highlights they need a bit of shape to them.

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