Marble SSS

Discuss or ask critique about your current works
Forum rules
Important notice: All artwork submitted on our public gallery forums gallery forums may or may not be used by OTOY for publication on our website gallery.
If you do not want us to publish your art, please mention it in your post clearly. (put a very red small diagonal cross in the left right corner of the image)
Any images already published on the gallery will be removed if the original author asks us to do so.
We recommend placing your credits on the images so you benefit from the exposure too, and use a minimum image width of 1200 pixels, and use pathtracing or PMC. Thanks for your attention, The OctaneRender Team.

For new users: this forum is moderated. Your first post will appear only after it has been reviewed by a moderator, so it will not show up immediately.

This is necessary to avoid this forum being flooded by spam.
Post Reply
User avatar (Default)
Synce
Licensed Customer
Posts: 52
Joined: Thu Oct 17, 2013 11:26 pm

I am trying to have a correct SSS, here testing with marble.
But i don't really understand why there is no scattering on the glossy material.
On this example, the best result i can get is mixing a specular mtl to a glossy one, but i don't like the fact of mixing materials, it isn't for me physically correct.
Is it possible to add a better way to do SSS on the 2.0? Like a skin shader in arnold, or just add a scattering node for the glossy material.
marble_001_cc.jpg
marble_002_cc.jpg
Model from Bertrand Benoit.
Last edited by Synce on Mon Apr 28, 2014 2:17 pm, edited 1 time in total.
Top
User avatar (Default)
treddie
Licensed Customer
Posts: 739
Joined: Fri Mar 23, 2012 5:44 am

I agree. I have run into similar problems. A mix material in this case only degrades the effect of either layer, and they end up fighting each other.
Win7 | Geforce TitanX w/ 12Gb | Geforce GTX-560 w/ 2Gb | 6-Core 3.5GHz | 32Gb | Cinema4D w RipTide Importer and OctaneExporter Plugs.
Top
User avatar (Default)
remKa
Licensed Customer
Posts: 232
Joined: Fri Jan 24, 2014 6:23 pm
Location: Paris
Contact:
Contact remKa

+ 1000

This is time consuming !
AMD 9950x3D / RTX 4090 / RTX 3090 / 192 Go DDR5 / Win 11
http://www.remy-kerbiquet.com
Top
User avatar (Default)
RealityFox
Licensed Customer
Posts: 273
Joined: Sat May 05, 2012 1:43 pm

I have found that using a mix node and then adding a fall off texture to the mix kind of helps usually. Needless to say, I really wish they would make a skin node and once they have the hair rendering implemented, hopefully, they can put in a hair material node. It would be nice if they did simplify the process for SSS.

Your renders looks pretty good btw, I think maybe doing some more work to the picture frame area (I think that is what it is) would help sell it better. It's a bit distracting from the marble.
Top
User avatar (Default)
tonysculptor
Licensed Customer
Posts: 62
Joined: Fri Aug 16, 2013 12:27 am
Location: Austin, TX
Contact:
Contact tonysculptor

By their nature, glossy materials can't have SSS in them. I had the same problem with making skin. What I did find is that if you use a specular material only with SSS and crank the scatter scale values to a high value you can get the desired result. A specular material still calculates reflection so the higlights should behave properly.
Tony Reynolds

i7 6 Core Processor | 680 GTX x 3, 4 GB VRAM | 128 GB Ram
Top
User avatar
ROUBAL
Licensed Customer
Posts: 2199
Joined: Mon Jan 25, 2010 5:25 pm
Location: FRANCE
Contact:
Contact ROUBAL

but i don't like the fact of mixing materials, it isn't for me physically correct.
I think that there is an infinity of materials between diamonds and rough cardboard. Very few perfect materials indeed. I see no problem with mixing material nodes.

Also, sometimes, the inside of an object has different characteristics than the surface, and it can be reproduced imho only by mixing materials of different kind.
French Blender user - CPU : intel Quad QX9650 at 3GHz - 8GB of RAM - Windows 7 Pro 64 bits. Display GPU : GeForce GTX 480 (2 Samsung 2443BW-1920x1600 monitors). External GPUs : two EVGA GTX 580 3GB in a Cubix GPU-Xpander Pro 2. NVidia Driver : 368.22.
Top
User avatar (Default)
treddie
Licensed Customer
Posts: 739
Joined: Fri Mar 23, 2012 5:44 am

I see no problem with mixing material nodes.
I agree for the most part, but mixing in many cases is a trade-off between the layers in the mix, where the qualities of the layers fight each other. As a result, often, you can't get the "perfect" set of qualities because they aren't truly layered one on top of the other. They are what the name implies..."mixed".
Win7 | Geforce TitanX w/ 12Gb | Geforce GTX-560 w/ 2Gb | 6-Core 3.5GHz | 32Gb | Cinema4D w RipTide Importer and OctaneExporter Plugs.
Top
User avatar
Karba
OctaneRender Team
Posts: 2300
Joined: Sat Jun 11, 2011 9:05 am

I would use specular material

Here is quick test
Attachments
Marble.jpg
Top
User avatar (Default)
treddie
Licensed Customer
Posts: 739
Joined: Fri Mar 23, 2012 5:44 am

That's really nice.
Win7 | Geforce TitanX w/ 12Gb | Geforce GTX-560 w/ 2Gb | 6-Core 3.5GHz | 32Gb | Cinema4D w RipTide Importer and OctaneExporter Plugs.
Top
User avatar (Default)
xxdanbrowne
Licensed Customer
Posts: 503
Joined: Wed Feb 06, 2013 2:38 am

Yes that material is gorgeous. If possible, would you mind uploading it to the liveDB please karba?
Top
Post Reply

Return to “Works In Progress”