Random walk SSS tutorial?

DAZ Studio Integrated Plugin (Integrated Plugin maintained by OTOY)

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IainW
Licensed Customer
Posts: 3
Joined: Sun Oct 13, 2019 2:46 pm

Hey folks!

This looks pretty useful:
https://www.youtube.com/watch?v=FGtYyAlByhY

(Aimed at Houdini users - but the set-up principles are universal).

IAIN.
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Sorel
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Posts: 257
Joined: Tue Feb 25, 2014 5:22 pm

IainW wrote:Hey folks!

This looks pretty useful:
https://www.youtube.com/watch?v=FGtYyAlByhY

(Aimed at Houdini users - but the set-up principles are universal).

IAIN.
Thank you for this, I'm having some great results with testing.
Kanne
Licensed Customer
Posts: 79
Joined: Wed Mar 06, 2019 5:51 pm

IainW wrote:Hey folks!

This looks pretty useful:
https://www.youtube.com/watch?v=FGtYyAlByhY

(Aimed at Houdini users - but the set-up principles are universal).

IAIN.
Tried it aswell, results are okisch, but have downsides in my opinion. I allways have problems setting up the reflections on specular materials. For example following image uses a shader based on the video above. If i use an HDRI with nice enviroment lighting it looks quite good, but if i use a pretty harsch direct light (still path tracing kernal) the fresnel like shader effect becomes really visible in the shadow regions.
Elly_Issue_2_Denoised-beauty.png
(There is just a single light source to the left of her and no other objets that could reflect light on the right side of her face)

The issue seems to inheriate from the indirect reflections channel.
Elly_Issue_2_Reflection-indirect.png
Any tips on how to approach/fix this issue?

Related to this issue i get artefacts on a little more complex lighting setups as well. There are artefacts on the eye lids, on the bottom of her right nostril and the issue with the fresnel-like effect too,
Elly_Issue_Reflection.png
Other than that issue i think it looks quite well
Elly_Issue_Denoised-beauty.png
jmdarko
Licensed Customer
Posts: 7
Joined: Tue Sep 18, 2018 10:38 pm

Can someone show me how the nodes should be set up on DAZ? I have have been experimenting but feel completely lost; Can't get any kind of results even close to what i have been seen of RandomWalk
Banti
Licensed Customer
Posts: 103
Joined: Sat Nov 16, 2019 9:45 pm

jmdarko wrote:Can someone show me how the nodes should be set up on DAZ? I have have been experimenting but feel completely lost; Can't get any kind of results even close to what i have been seen of RandomWalk

https://www.youtube.com/watch?v=FGtYyAlByhY
This is a good starting point. Its not DAZ but the nodes are the same. I can upload my skin shader notes later on
jmdarko
Licensed Customer
Posts: 7
Joined: Tue Sep 18, 2018 10:38 pm

Banti wrote:
jmdarko wrote:Can someone show me how the nodes should be set up on DAZ? I have have been experimenting but feel completely lost; Can't get any kind of results even close to what i have been seen of RandomWalk

https://www.youtube.com/watch?v=FGtYyAlByhY
This is a good starting point. Its not DAZ but the nodes are the same. I can upload my skin shader notes later on
Thank you! This really helped me to get some results, another thing, Is there a way to fix this problem? I get it when using both Specular and diffuse layers, when following his guide, i guess it's the character geometry showing up? It also appears all around the model's bodies
Arms .png
Banti
Licensed Customer
Posts: 103
Joined: Sat Nov 16, 2019 9:45 pm

jmdarko wrote:
Banti wrote:
jmdarko wrote:Can someone show me how the nodes should be set up on DAZ? I have have been experimenting but feel completely lost; Can't get any kind of results even close to what i have been seen of RandomWalk

https://www.youtube.com/watch?v=FGtYyAlByhY
This is a good starting point. Its not DAZ but the nodes are the same. I can upload my skin shader notes later on
Thank you! This really helped me to get some results, another thing, Is there a way to fix this problem? I get it when using both Specular and diffuse layers, when following his guide, i guess it's the character geometry showing up? It also appears all around the model's bodies
Arms .png
You need to increase your figures subdivision level to at least 3. And make sure that "smoothing" is enabled in all your materials. This is a known problem with scattering and developers are aware of this. But since the last answer we got regarding this issue was "its just how the plugins works", i am not sure this will ever relly be fixed.
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