Subsurface scattering so far...

Started by Hannes, April 04, 2019, 05:05:50 AM

Previous topic - Next topic

Hannes

Matt asked me to write a short post on how I did the weird subsurface scattering stuff mainly in the second half of this thread:
https://planetside.co.uk/forums/index.php/topic,26401.0.html
Translucency is the light shining through thin objects without volumetric density. To fake subsurface scattering I had to place a slightly smaller object (that fakes the internal density) inside my main object that has a translucent material assigned to (like the "Fleshy" or "Translucent plastic" materials in the Materials section. The path tracer is way more accurate for this than the legacy sampler.
In this case I didn't use Matt's great translucency settings here:
https://planetside.co.uk/forums/index.php/topic,26401.msg263012.html#msg263012
and just used values that looked OK to me.

I attached the scene file for those who want to play with the scene.
I'm really looking forward to try the SSS material Matt had announced and compare it to my method, since it's only a fake.

EDIT: In the scene file the main object is disabled. I forgot to reenable it!!!

Be aware that the color of the internal object can make the image look quite different, since it shines through, but that may produce interesting effects.

Matt

This is great! Can you show us the examples of what you can do with this technique, copied from other threads?
Just because milk is white doesn't mean that clouds are made of milk.

Hannes

Sure.

Hannes

Indirect lighting.

bobbystahr

Brilliant work Hannes, thanks for the share.
something borrowed,
something Blue.
Ring out the Old.
Bring in the New
Bobby Stahr, Paracosmologist

sjefen

This is ridiculously awesome!  :o
Really wish there was a native SSS in TG.


- Terje
ArtStation: https://www.artstation.com/royalt

AMD Ryzen Threadripper 1950X
128 GB RAM
GeForce RTX 3060 12GB

Hannes

Nothing really weird this time. I used the Stanford dragon model and created an inner object by a negative extrusion of the faces in Max. If you look closely you can see the shape of the inserted model, especially inside the upper horns and in the end of the tail, but nevertheless it looks like subsurface scattering.

I may have mentioned that before, but I'm really looking forward to Matt's SSS solution... ;) ;) ;)


mhaze

Thanks for that, Hannes - will be useful for ice amongst other things.

luvsmuzik

Messin' with Hanne's measles tgc (no reflect) pinkish,  and Matt's suggested translucency settings, yellowish

2 gourds set one inside of the other, already displaced surface (Blender modifier)

One light source, may try two.