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tutorial for adding a "cutout opacity" brick to a shader

lululee1lululee1 Posts: 343
in The Commons

Hi,

I'm looking for a tutorial for adding a cutout opacity brick to a shader. I have purchased sosme products lately that

have no "cutout opacity"  which makes them unusable for me but I like the products.

I would like to learn more on how the shaders are made.

Cheerio

lululee 

Comments

  • LeanaLeana Posts: 11,783

    I don't know of any tutorial fo that, but if what you want is a version of PBR skin shader with the cutout opacity channel you can use this: https://www.daz3d.com/pbr-skin-plus

  • lululee1lululee1 Posts: 343

    Hi,

      Thanks for the valuable info on the skin shader.

    I am making geometry shell gems for bodygloves so I need to have a "cutout opacity" for a gem shader.

    If I apply the gem shaders it wipes out the cutout opacity.

    Any advice is appreciated.

  • Matt_CastleMatt_Castle Posts: 2,594
    edited December 2

    You can't.

    There's a hardcoded restriction in Iray that whenever a material has cutout opacity as anything other than fully opaque with no map, "Thin Walled" is automatically forced on internally, and there's no way for any shader to override that. (This is a major reason it was left out of things like the default PBRSkin shader, because it's normally clutter that's unusable for standard uses of the shader but will bog it down anyway).

    As being thick walled is essential for gemstones to look like gemstones and not soap bubbles, using a cutout opacity brick on a gem shader will break it.

    (I have one experiment I mean to try some time to try to work around this limitation, but I'm not hugely optimistic).

    Post edited by Matt_Castle on
  • ElorElor Posts: 1,642

    @AllenArt's Iray Jewelry Shaders still have the cutout opacity option, but after reading @Matt_Castle's message, no idea if it'll do what you want once activated.

    But it's free, so at worse, if it doesn't do what you want, you'll only have lost a couple of minutes testing it in exchange for having a nice set of jewelry shaders for when you don't need cutout opacity.

    https://sharecg.com/v/95893/gallery/21/DAZ-Studio/Iray-Jewelry-Shaders

  • lululee1lululee1 Posts: 343

    Hi,

    Thanks so much for all of the valuable info.

    I'll try AllanArt's set.

    Cheerio    lululee

  • lululee1lululee1 Posts: 343

    Hi,

    A quick thank you to Elor and AllanArt.

    The AllanArt jewelry shaders are beautiful and work with the cutout opacity  I am working on.

    Thank you so much for posting the link.

    Cheerio

    lululee

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