Indigo Renderer Forum

Updated
Here is the final version of the Schott Glass Material Library complete with previews of every single material (approximately 8 days of rendering without pause).

Click here to download the library - includes a fix for one missing material and another incorrectly named

You can directly include this file into any .igs using the following code: You can also use the included catalog PDF to make it easier to select a particular glass that might suit your requirements. There is one material per glass and the materials are named exactly as the glasses are so SF57 in the catalog = material name SF57 in the library.

This library will only work with Indigo version 1.0.1 and above as it uses the new tabulated data tag.

Previews:
Size reference: Sphere has a 5cm diameter and the pane is 5cm x 5cm x 0.5cm.

Each rendered to 5000spp:




















































SF57 Test rendered to 16000 samples/pixel

wow.... great work, not I get an Idea what this new function may be good for

So now tell me what glass could I take for a nice vase, a wine glass, a cola bottle or even a car window

or is this library only "correct" for special prisms, lenses etc. ...
Maybe there exists an overall usable glass that looks nice/correct for everything?

http://www.schott.com/ - you might find it, here

I am currently running a test of SF57 on my crystal glass object as it looks from it's values to be a 'crystal' type glass; it contains lead and has a high base IoR, So far the test is looking pretty damn nice

I can't tell you off the top of my head exactly what to pick. I've done the hard work of converting this data to indigo materials now you can do the hard work of figuring out which one is best for what

But basically if you are looking for a window glass then you would want one with a relatively low base IoR and high/uniform transmittance across the spectrum.

Kram1032 wrote:http://www.schott.com/ - you might find it, here

This glass stuff is so special... I've never known of most stuff their glass is used for.
Perhaps I should stay at using specular etc. it the classic way

window: low green absorption, quite high (relative to the green absorption, so, it's still low) blue.
red somewhere in between.

IoR 1.45-1.55

WytRaven

thanks man, appreciate the effort!

Totally agree, thanks for putting this together. I don't know if I'll use it for any of my stuff, but the option remains

now how to get exporters to support these new tabulated format....?

i was hoping we'd set it up to be as easy as specifying an .nk file is right now, myself

a source of tabulated spectra materials in radiance mgf format.
http://radsite.lbl.gov/mgf/materials.html
For explanations on format: http://local.wasp.uwa.edu.au/~pbourke/d ... html#begin

for example:

c Small_magenta_flower_(from_vine) =
cspec 400 700 0.0788 0.1019 0.1203 0.131 0.1352 0.1363 0.1311 \
0.1206 0.1051 0.0895 0.0762 0.0663 0.0576 0.0516 0.0483 \
0.0472 0.0478 0.051 0.0576 0.071 0.0952 0.1278 0.1593 \
0.1859 0.2109 0.2392 0.2672 0.2794 0.2966 0.3603 0.436
m Small_magenta_flower_(from_vine) =
rd 0.0777697

can be converted to:

<regular_tabulated>
<start_wavelength>0.4E-06</start_wavelength>
<end_wavelength>0.7E-06</end_wavelength>
<num_values>31</num_values>
<values>
0.0788 0.1019 0.1203 0.131 0.1352 0.1363 0.1311 0.1206 0.1051 0.0895 0.0762 0.0663 0.0576 0.0516 0.0483 0.0472 0.0478 0.051 0.0576 0.071 0.0952 0.1278 0.1593 0.1859 0.2109 0.2392 0.2672 0.2794 0.2966 0.3603 0.436
</values>
</regular_tabulated>

I don't know how convert rd (diffuse reflectance) in Indigo, maybe phong IOR

search on google for radiance mgf for others...

SF57 test added to original post... It's a terrible 'shot' I know but it is just a test afterall. Screwed up the DoF big time Stupid DSCS315 camera...

that actually looks good to me

I guess your just too familiar with the render to appreciate it
Happens to me too...

That render u added to the post ROCKS!
please upload to gallery!

those light lines O.o amazing caustics!!! That's great!!! Oh, and also those great reflections and refractions of the dices O.o really a great material