SSS Test Scene

Stur · Post by **Stur** » Tue May 22, 2007 8:09 pm

Hi,

I've made a small scene to see the effects of exponent in absorption and SSS. The color of absorbance is full red, and the one of SSS is full blue.

The result is not exactly what I expected, specially column 1. How come Suzane looks yellowish when blue SSS exponent rises instead of blue ?

My computer (or just Indigo) crashed early in the night, so the picture is still too noised. The lame and quick editing in MS Paint at work added jpeg artifacts too, but I'll post a better render later.

I thought my tests could interest someone else.

Behrendt · Post by **Behrendt** » Tue May 22, 2007 8:17 pm

I'm not into SSS yet. But I think your model turns yellow because all blue light gets absorbed

So try yellow and it should turn blue

tinuvielle · Post by **tinuvielle** » Tue May 22, 2007 8:21 pm

Hello,

I think the scale you use for your picture should be modified, since the most important changes seem to take place in the 2 or 3 left-most columns and top-most rows. Maybe you could use some kind of logarithmic scale ? (0.001, 0.01, 0.1, 1, 10, ...)

Anthony · Post by **Anthony** » Tue May 22, 2007 8:24 pm

Holy Crap
This could be the most usefullest and awesomest thing ever if rendered goodly and without the use of MS Paint and some other program instead. Its like a great big visual tutorial!

Stur · Post by **Stur** » Tue May 22, 2007 8:32 pm

Tinuvielle : yep. In fact, I noticed that the exponent was limited to 1000 in Blendigo and wondered why. That's why I choose this scale.
I'll make a cleaner render of this scene, and maybe other scenes with different parameters as you suggest.

Anthony · Post by **Anthony** » Tue May 22, 2007 8:40 pm

Don't forget to make it higher resolution

Stur · Post by **Stur** » Tue May 22, 2007 9:20 pm

Yep

But my computer is rather old and slow.

Anthony · Post by **Anthony** » Tue May 22, 2007 9:24 pm

Remember the age old proverb "If you can't render it yourself, make someone else (preferably with an awesome computer/network) do it for you and then give you *complete* credit." -Oscar Wilde

Stur · Post by **Stur** » Tue May 22, 2007 9:50 pm

He he, don't worry, I already thought of sharing the .blend

But I've got two or three things to try first.

Post by **fused** » Tue May 22, 2007 10:04 pm

so many apes....

hope you used a script for that... if not: respect!

drBouvierLeduc · Post by **drBouvierLeduc** » Tue May 22, 2007 10:17 pm

Good idea, extremely usefull

SimonLarsen · Post by **SimonLarsen** » Tue May 22, 2007 10:26 pm

Stur:
I'm not very good at sss so it would be a big help for me.
Good idea.

fused wrote:

so many apes....

hope you used a script for that... if not: respect!

Probably just the Array-modifyer.

But you can do it in a minute without even using the mouse.

Stur · Post by **Stur** » Tue May 22, 2007 10:55 pm

Thx for comments

No script, I did it by hand. The duplication of Suzanne was fast, but the assignation of the materials was pretty awfull.

I thought of making a prog to generate this, but i wanted a result quickly so i did not take time to launch myself in a developpement.

But i'm thinking of it right now

Post by **fused** » Tue May 22, 2007 11:11 pm

@SimonLarsen: no comment (except this, of course

)

@Stur: i would be interested if the absorption values are indigo specific (they seem to be pretty large numbers, or are the apes so small?)

if they are this would be a great thing not only for blender users

Stur · Post by **Stur** » Wed May 23, 2007 12:00 am

The apes are about 13x10x8cm.

It seems to interest some people so I'll try to do something fun, and not blender specific.

SSS Test Scene

SSS Test Scene

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