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What determines the quality of translucency?

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  • What determines the quality of translucency?

    Hello!

    I'm trying to create an animation with a beer bottle that is lit from the inside.

    So I'm thinking, finally it's time to take on the transparency settings in VrayMat. And I did have some very good looking effects for stills, but animation is a problem.

    In fact, the translucency effect is so random, even in the same frame, that it's enough to render a few strips using the region render in VFB, and each strip will be very different than the next.

    Click image for larger version

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    The settings for the beer vraymat are:
    Diffuse 128 grey
    Reflect 255 white / fresnel /not glossy
    Refract 230 almost white / IOR 1.6 / not glossy
    Fog color: 225 beige/yellow (165 saturation), multiplier 0.1
    Translucency:
    type: Hybrid, same color as Fog, thickness: 10 cm, scatter coef 0.5, Fwd/bck: 1.0, light mult:1

    The light inside the bottle is a Vray Sphere light, almost white, multiplier 1000, invisible.

    GI is Irmap@LOW + Lightcache. Unchecking "use LC for glossy rays" and "randomize samples" in Irmap did not change the effect.

    My question is: what is the equivalent of "subdivs" for the translucency effect? Since my material is not glossy, it does not make sense to increase glossy subdivs?

    Is the quality of the translucency effect decided by the sampler subdivs? or maybe Irmap settings? Or light sampling?

    Regards,
    Tommy

  • #2
    I always controlled the noise with my refractive subdivs.

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