Gemstones

General discussion about Indigo Materials - material requests, material developement, feedback, etc..
User avatar
Meelis
Posts: 383
Joined: Sat Mar 14, 2009 11:29 pm
Location: Estonia

Re: Gemstones

Post by Meelis » Wed Jan 26, 2011 6:57 pm

Thank you Soup :D

1 question when uploading materials to MDB,
is it ok if i give full link to where material properties is based on,
or but because of spam probably better would be to edit like:

from
http://refractiveindex.info/
http://minerals.gps.caltech.edu/FILES/V ... tz/rose.mt

to
refractiveindex info
minerals gps caltech edu FILES Visible quartz rose mt

-----------------

The material is glossy transparent with absorption layer transmittance texture and subsurface scattering.
Anyway i had diffuse transmission data, not 100% sure if i calculated absorption right (visually it looked ok)
2nt column from:
http://minerals.gps.caltech.edu/FILES/V ... tz/rose.mt
would be X
and absorption = LOG(1/(1-X))

And Because measured sample thickness wasn't given
i take from http://minerals.gps.caltech.edu/FILES/V ... z/rose.gif
@ 500 nm abs = 0,636
but my calculated abs @ 500 nm from data file = 0,4153536
=> 0,636/0,4153536*Absorption*100

:) :idea: But i like more lighter Rose Quartz so i divide abs values

Soup
Posts: 444
Joined: Sat Jun 13, 2009 1:20 am

Re: Gemstones

Post by Soup » Thu Jan 27, 2011 8:18 am

Meelis wrote:Thank you Soup :D

1 question when uploading materials to MDB,
is it ok if i give full link to where material properties is based on,
or but because of spam probably better would be to edit like:

from
http://refractiveindex.info/
http://minerals.gps.caltech.edu/FILES/V ... tz/rose.mt

to
refractiveindex info
minerals gps caltech edu FILES Visible quartz rose mt
You can go ahead and post those links in the material's page :)

User avatar
dag
Posts: 189
Joined: Tue Feb 02, 2010 2:28 am

Re: Gemstones

Post by dag » Sat Feb 12, 2011 6:22 pm

26 materials that use measured data.
Rose Quartz scattering down to 400 to spice it up a bit.
Attachments
gem.jpg

User avatar
Meelis
Posts: 383
Joined: Sat Mar 14, 2009 11:29 pm
Location: Estonia

Re: Gemstones

Post by Meelis » Mon Feb 14, 2011 12:06 am

dag wrote:26 materials that use measured data.
Rose Quartz scattering down to 400 to spice it up a bit.
WOW your renders are soo beautiful :shock:

I must say some of the materials i made look very different from some gemstones that were in MDB before i uploaded some of theme there. The default previews looked very same for example Emerald's, Topaz's, Amethyst's. Your preview gives much better overview i must say especially for the really dark gemstones. On default preview Italy Andradite and Brazil Greenish-yellow Chrysoberyl looked like the same.
I haven't uploaded some black looking on preview scene, allthow on photos they look nice,
the very dark like: Thailand Ruby, Afghanistan Dark Green tourmaline, USA Georga lazulite, Island Blue Cobaltian Spinel.

But the dark gems look really good in small size
Like on that photo:
Image

User avatar
dakiru
Indigo 100
Posts: 746
Joined: Mon Jun 22, 2009 6:51 am

Re: Gemstones

Post by dakiru » Tue Feb 15, 2011 8:57 am

dag wrote:26 materials that use measured data.
Rose Quartz scattering down to 400 to spice it up a bit.
That's a nice material reference 8) How big are these gems?

User avatar
dag
Posts: 189
Joined: Tue Feb 02, 2010 2:28 am

Re: Gemstones

Post by dag » Tue Feb 15, 2011 10:55 am

1cm diameter (4 carat) on the diamond cut.
Most of these would probably look better on different cut gems, but was too lazy to model different ones.

User avatar
dakiru
Indigo 100
Posts: 746
Joined: Mon Jun 22, 2009 6:51 am

Re: Gemstones

Post by dakiru » Tue Feb 15, 2011 2:19 pm

dag wrote:1cm diameter (4 carat) on the diamond cut.
Most of these would probably look better on different cut gems, but was too lazy to model different ones.
Thanks! :) Actually, you don't have to model them 8)

Post Reply
22 posts

Who is online

Users browsing this forum: No registered users and 1 guest