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Iray: Part-reflective Glass?

OstadanOstadan Posts: 1,128
edited December 1969 in The Commons

I want to create an image of someone looking out a window, but with his facial expression visible in a reflection from the glass. I cannot seem to find the knob to make a glass shader more reflective.

It may not be possible to get it just as I want, and may just end up replacing the glass with a full mirror and compositing the two versions in Gimp. But I'd prefer not to.

Comments

  • jpb06tjpb06t Posts: 272
    edited December 1969

    The scene is made by a "glass pane" (i.e. a scaled cube, with the Glass - Thin - Clear material) and two spheres, one (the black one) in front of the glass pane, the other behind the pane.

    We get:
    1 - two reflections of the black sphere, one for each air-glass interface,
    2 - one reflection of the red sphere on the bottom flat part of the glass pane,
    3 - environment light reflected by the pane sides.

    No knobs to turn, just physically correct models, physically based materials and a PBR engine :-).

    daz.png
    512 x 512 - 208K
  • frank0314frank0314 Posts: 14,330
    edited June 2015

    What is your raytrace bounce set at in your render settings. To accomplish what you want it needs to be 3 or above. I like to keep mine set at 4 if I have any reflective surfaces in the scene. If you wanna see the reflection in the window you'd need to turn your reflection up pretty high and maybe try adding a grey color to your diffuse channel for the glass.

    Post edited by frank0314 on
  • Richard HaseltineRichard Haseltine Posts: 102,865
    edited December 1969

    Iray doesn't use a bounce setting. The main thing is to get the lighting levels right - if it's bright outside and dimmer inside you won't get much of a reflection on the glass, if it's light in and dark out you will. Viewing angle is also a factor.

  • frank0314frank0314 Posts: 14,330
    edited December 1969

    I missed the Iray in the title

  • mjc1016mjc1016 Posts: 15,001
    edited December 1969

    And is your glass dimensional, like latego's?

    For Iray to work with a glass material, properly, it needs to be something other than a single thickness flat plane. (this is true for just about every raytracing renderer around...including the newer features of 3Delight (the raytrace hider, especially if using a plausible glass shader and not just an opacity = (nearly) 0% setting on the default DS shader).

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