SSS tests

General questions about Indigo, the scene format, rendering etc...
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OnoSendai
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SSS tests

Post by OnoSendai » Thu Dec 28, 2006 11:14 pm

Some sub-surface scattering tests.

Image

Image

The second one has more absorption, and also a specular material at the interface.

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tungee
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Post by tungee » Thu Dec 28, 2006 11:35 pm

:) :) :) :) :) :) :) :lol: :lol: :lol: :lol: :lol: :oops: :oops: :oops: :P :P :P :shock: :shock: :shock: :shock: :D :D :o :o :o :( :(

Nice Ono!
Yes!
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Post by Phil » Fri Dec 29, 2006 12:00 am

Hi,

:?: in this scene; is the mesh emitter passing through the model :?:
Is this Indigo 0.6 :?:

Regards, Phil
Last edited by Phil on Fri Dec 29, 2006 12:02 am, edited 1 time in total.

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OnoSendai
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Post by OnoSendai » Fri Dec 29, 2006 12:01 am

Phil wrote:Hi,

:?: in this scene; is the mesh emitter passing through the model :?:

Regards, Phil
Possibly, I think it might be passing thru the sphere, i think it just misses the Buddha :)

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CTZn
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Post by CTZn » Fri Dec 29, 2006 12:22 am

Hey, that's nice you're working on that Ono ! I've got a lot of questions tho :)

1) How fast is it to converge, say compared with Cauchy's dispersion ?

2) Is that a) simple or b) true scattering, and (optionally) if b) what's your estimation of the average # of scatters occuring within the object ? Maybe if that's too long to converge that would be cool to be able to switch between both modes ?

3) Can you post an image with a stronger effect please :)

4) When is the next release of Indigo (optional Q too) :D ;)

Thx

:arrow: []

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Post by OnoSendai » Fri Dec 29, 2006 12:38 am

1)
Hard to say how fast it is in general.
The images above took about an hour and 30 mins respectively.
The speed will depend on a lot of factors

2)
it's true unbiased multiple subsurface scattering.

The examples are showing uniform isotropic scattering. The number of scatters depends on the scattering and absorption coefficients. Frankly i have little idea how many scatters are occurring in the above images, but it may be 10 scatters or more on average per ray.

EDIT: the 'fake SSS' (glossy transmission) will still be available as a material, so you will be able to take your pick between the two, or even combine them.

3) The effect is very strong, in the first image, the colour and scattering properties of the buddha and sphere are entirely due to absorption and scattering.
I'm gonna work on some forwards scattering which should give a more familiar SSS effect :)


4) heh, dunno, will be a little while tho :)

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CTZn
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Post by CTZn » Fri Dec 29, 2006 1:08 am

Thank you for the feedback OnoSendai !

2) [Edit] is cool !

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Post by IanC » Fri Dec 29, 2006 1:58 am

Wow, sounds cool!

2 is indeed very funky.
EDIT: the 'fake SSS' (glossy transmission) will still be available as a material, so you will be able to take your pick between the two, or even combine them.
Is that currently available? (in released versions?)
I'm gonna work on some forwards scattering which should give a more familiar SSS effect Smile
Whats the difference between this and forward scattering?

Anyway, enough questions, onto the kudos:

KUDOS

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OnoSendai
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Post by OnoSendai » Fri Dec 29, 2006 2:01 am

IanC wrote:Wow, sounds cool!

2 is indeed very funky.
EDIT: the 'fake SSS' (glossy transmission) will still be available as a material, so you will be able to take your pick between the two, or even combine them.
Is that currently available? (in released versions?)
I'm gonna work on some forwards scattering which should give a more familiar SSS effect Smile
Whats the difference between this and forward scattering?

Anyway, enough questions, onto the kudos:

KUDOS
No, it's not available in released versions.

forwards scattering is when the light is scattered more in the direction it was heading, as opposed to uniform scattering, where it is scattered equally in all directions.

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drBouvierLeduc
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Re: SSS tests

Post by drBouvierLeduc » Fri Dec 29, 2006 2:32 am

OnoSendai wrote:Some sub-surface scattering tests.
be blessed !

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arneoog
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Post by arneoog » Fri Dec 29, 2006 2:34 am

AWSOME :D

*I will make so many candles when I get my hands on this!*


EDIT: in the SSS, do you have controls for the external color (Skin)
and the internal color (flesh) :)
I hope so :D
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Pinko
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Post by Pinko » Fri Dec 29, 2006 2:37 am

Very very good Ono!!!!!!!!
Pinko. :wink:

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CTZn
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Post by CTZn » Fri Dec 29, 2006 2:48 am

EDIT: in the SSS, do you have controls for the external color (Skin)
and the internal color (flesh) :)
I hope so :D
Or material layering, yay ;)

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zsouthboy
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Post by zsouthboy » Fri Dec 29, 2006 4:18 am

Did anyone else get an erection, just now?







Just me then? :oops:

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OnoSendai
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Post by OnoSendai » Fri Dec 29, 2006 4:19 am

arneoog wrote:AWSOME :D

*I will make so many candles when I get my hands on this!*


EDIT: in the SSS, do you have controls for the external color (Skin)
and the internal color (flesh) :)
I hope so :D
Dunno, i'm still working on the materials that will be used for stuff like skin.
(probably some kind of glossy dielectric material)

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