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H16 Principled Shader : SSS Noise


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Hey,

I'm trying to render some paper/vegetable models so I'm using SSS in the H16 Principled Shader.  However, I'm getting a lot of noise.  The old Principled Shader on H15.5 had fake SSS, and the Classic Shader only has a Quality slider when using the deprecated physical SSS model, instead of the new BSSRDF.

The Houdini docs are out of date and still say that SSS is a fast approx. so is there any other way to increase SSS samples within the shader?

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You can add the SSS Samples Property to geometry objects:

screencast-2017-06-28-001221.gif.30f545d0b3df904e11580d6518050add.gif

Now when you render, you'll get more samples on the objects where you need it.

screenshot-area-2017-06-28-001849.png.5f039e8b532426a3650dc11b18bd3738.png

Pixel Samples are the one property that can only live at the object level; there are probably others, but that's the only one I can remember. Here's some documentation: http://www.sidefx.com/docs/houdini/props/_index

per_obj_sss.hipnc

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  • 11 months later...

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