Volumetric/SSS rendering playground

[Siahpoosh]

nice results Bigguns

[Bigguns]

thank's man

here's a big render overnight

and one this morning

[Ondra]

ok, I think I will need to remove volume mtl. Although it currently works exactly the same as coronamtl, there is too much placebo effect going on ;)

[Bigguns]

What do you mean Keymaster? I don't want you to remove this shader lol

[Ondra]

As I said... currently volume mtl works EXACTLY the same as CoronaMtl with opacity set to 0. Yet people think there is some difference in shading. So it is confusing

[Ludvik Koutny]

What Keymaster means is that what's in CoronaMTL is identical to what's in VolumeMTL.

If you want to get identical results to VolumeMTL here are two ways:

1, Set opacity level to 0.0 - this will make sure CoronaMTL will behave and perform same as VolumeMTL

2, Instead of 0 opacity, set refraction level to 1.0, then set IOR to 1.0, and set diffuse level to 0.0. This will perform slightly slower than 0 opacity setup, but parameters like reflection or refraction glossiness will have an effect. Zero opacity will completely ignore diffuse, reflection and refraction.

[maru]

You can't put maps in VolumeMtl - it is different. ;)

[Bigguns]

ha ok thank's for the infos!

But, you know, how I made this one is with a Vray blend  ( since corona don'T have for now a  Corona blend like Vray..) and I bleded it at 10 % with a corona Mtl to get the reflection.

Not sure if you should remove it, when you will have a corona blend maybe it will be cool to have it as a separate shader instead of the whole corona Mtl, maybe it will be faster since less parameters to check? I don't know you the boss ^^.

I really van't wait you to do the skin shader and hair shader.. I feel it's going to be a killer :)  Are you planning to do a volumetric skin shader like in Lagoa render or a more conventionnal one like arnold or Vray ? Or a better approach then all :)


We need a first refractive layer so we see the fur going through the skin, etc O a;ready tell you, and no one has this for now :) That's why I was thinking maybe making the first 2 layers sss volumetric, but probably there is a better approach to this hehe.

Is it planned that we can use the volume Mtl with textures?

[Ondra]

interesting tidbit: CoronaMtl, CoronaLightMtl, CoronaVolumeMtl, CoronaShadowCatcherMtl, and CoronaVolumeMtl are all translated into the same material internally... so no, there is no speed bonus for using volume mtl ;). Material parsing is instant process, and the runtime overhead is designed to be minimal when advanced features are disabled.

[Bigguns]

ha ok thank's for the info.

I still think you should find a way so we can use a diffuse texture with the volumetric sss, it's really cool and I can see a lot of applications where it can be used, other then  just clouds etc. Again I don't know if it's possible ^^

Here's a link to the volumetric skin shader of Lagoa render : https://www.behance.net/gallery/9661407/Character-Visualization-via-Lagoa
I never tried it but look's cool! It has a different feel from Vray and Arnold etc.

and they have the best hair shader I've seen so far.

[romullus]

Finally i found time to play with SSS. At first my reaction was... wtf, how this thing suppose to work?! But after some spent time, things became a little bit clearer.

Here's my first attempt. I wonder, how to simulate bones without putting actual mesh inside skin? I tried to put some cylinders into fingers and results were really good, but i'd like to do it via material, if possible.

Model and textures are from: JokerMartini

[jjaz82]

thank you headoff :)
i try to simulate a smoke effect

[Stan_But]

thank you headoff :)
i try to simulate a smoke effect

u welcome!)
Good sample of the noised smoke! (;   

[AmSon]

Oh, and some one could be a hero and finally do that god damn orange juice! :D

Testing, it looks a lot better now :D

CAN U SHARE THE SETTINGS AND MATERIAL ?THNX

[romullus]

More photorealistic attempt. After several hours of playing with parameters and textures, i get half a decent result... in a shaded lighting scenario. But as soon as i introduce direct light, whole skin illusion start falling appart. Somehow shadows from direct light sources looks very wrong.