Forum: Poser - OFFICIAL


Subject: Cycles SSS skin and Branched Path Tracing?

Afrodite-Ohki opened this issue on Jun 05, 2019 ยท 5 posts


Afrodite-Ohki posted Wed, 05 June 2019 at 8:28 AM

So, I got reported a problem with my already released character set.

Here's the Superfly version of her skin shader (External outputs plugged to Cycles root, External inputs plugged to diffuse, bump and spec maps): image.png

I've been testing her always with Branched Path Tracing off and Progressive Refinement on, as that works best for me and I thought the only difference in those were render times and quality in specific things. However, a customer of mine uses Branched Path Tracing on. Here's my trouble.

Branched Path Tracing off: image.png

Branched Path Tracing on: image.png

The only difference I could get was if I turn Volume Samples higher: image.png

What gives? Is there anything I can tell my customer to do without me having to change her shaders (as this is an already released product)?

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Feel free to call me Ohki!

Poser Pro 11, Poser 12 and Poser 13, Windows 10, Superfly junkie. My units are milimeters.

Persephone (the computer): AMD Ryzen 9 5900x, RTX 3070 GPU, 96gb ram.


Afrodite-Ohki posted Wed, 05 June 2019 at 11:24 AM

Answered in the Smith Micro forum. Thanks!

- - - - - - 

Feel free to call me Ohki!

Poser Pro 11, Poser 12 and Poser 13, Windows 10, Superfly junkie. My units are milimeters.

Persephone (the computer): AMD Ryzen 9 5900x, RTX 3070 GPU, 96gb ram.


Boni posted Wed, 05 June 2019 at 1:43 PM

AS a courtesy, could you relay the answer here for those following this thread?

Boni



"Be Hero to Yourself" -- Peter Tork


Afrodite-Ohki posted Wed, 05 June 2019 at 2:53 PM

Sure! The Scatter Volume node shouldn't be there - I used it because I'd seen a skin shader with it from years ago, and started adding more nodes to get the look I wanted. Turns out the node wasn't even being rendered with Branched Path Tracing off to begin with, for some reason - so the rest of the shader was responsible for the entire look I wanted, and the Scatter Volume was causing all that weird redness/blackness with Branched Path Tracing. I just deleted that node and everything worked.

More details, and some tips for the SubsurfaceScattering node, on the thread I was given this answer: https://forum.smithmicro.com/topic/9665/cycles-sss-skin-and-branched-path-tracing/14

- - - - - - 

Feel free to call me Ohki!

Poser Pro 11, Poser 12 and Poser 13, Windows 10, Superfly junkie. My units are milimeters.

Persephone (the computer): AMD Ryzen 9 5900x, RTX 3070 GPU, 96gb ram.


Boni posted Wed, 05 June 2019 at 4:04 PM

👍

Boni



"Be Hero to Yourself" -- Peter Tork