lampshade and SSS

nikolatesla20 · Post by **nikolatesla20** » Tue Mar 13, 2007 5:05 am

I've been trying to make a lampshade.

I'm using Blendigo for .07t5 Indigo

I put a bulb (a meshlight) inside a lamp, which the lamp's surface is set with:

Specular
IOR 1.0
RGB set to absorb all but dark orange, gain set to 25 or so
SSS set to RGB, to scatter oranges, gain set to 25 or so as well

I get some scattering, but I can still see the bulb inside. I then duplicated the shade mesh twice more, and sized it bigger, so I have 3 layers of shade. It worked a little better but not much.

I don't see how to get a realistic lamp shade. Even with SSS turned on, the bulb is still very visible, almost like looking thru a type of fabric, rather than like paper (which will absorb the light and scatter it very much).

attached is a picture of the lamp, and also the blend file I'm using.

-niko

Kram1032 · Post by **Kram1032** » Tue Mar 13, 2007 5:08 am

you need to increase IOR! try 1.5.
But this wont work, if your lampshade doesn't have thickness! Model it as, say, 3mm... looks nice

nikolatesla20 · Post by **nikolatesla20** » Tue Mar 13, 2007 5:56 am

Thanks for the response Kram.

I did try IOR 1.5 before this screenshot, but then I got glass and reflections, but no light made it thru the lampshade!

The shade definitely does have thickness, I made sure of that when I modeled it.

Dumb question - how does blender's units map to Indigo units, for real world measurements?

Thanks again for the help, man. Sorry for being a newb.

-niko

suvakas · Post by **suvakas** » Tue Mar 13, 2007 6:02 am

Try with glossy transparency and higher SSS value.

Suvakas

Kram1032 · Post by **Kram1032** » Tue Mar 13, 2007 6:03 am

1 BU = 1 Indigo meter

Yes, mats do have reflections, naturally...
But otherwise, you don't get much better translutecy

nikolatesla20 · Post by **nikolatesla20** » Tue Mar 13, 2007 7:13 am

Ok, I changed to glossy_transparent, and this is what I have now.

I have only one thickness of shade.

Screenshot of blendigo settings as well.

-niko

Kram1032 · Post by **Kram1032** » Tue Mar 13, 2007 7:20 am

looks nice

the light is a bit orangeish, how ever...
try blacklight 5000 with whitebalance E

If you want to get it less transparent, you may can change SSS to uniform and a high value...
but I don't know...
I'm searching for SSS for leaves, myself...

nikolatesla20 · Post by **nikolatesla20** » Tue Mar 13, 2007 7:23 am

Ok, I'll keep working on 'er

This was after setting SSS to uniform instead.

-niko

Post by **fused** » Tue Mar 13, 2007 7:38 am

hmmm i cant find that very thread now, but:

i think i read somewhere that there is an energie loss bug in the glossy_transp mat(and it does look like there is). is this right? try using normal transparent mat

Kram1032 · Post by **Kram1032** » Tue Mar 13, 2007 8:34 am

yes... could be...
But definately use uniform SSS^^
this should work, as it looks