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Changing colour of ior file
Posted: Mon Jan 12, 2009 11:09 pm
by caryjames
Hi All- I would like to be able to render some coloured diamonds in my jewellery designs.
Is there a way to easily alter the colour of the diamond ior file without getting into loading spreadsheets of physical and gemmological properties?
Thanks
Posted: Tue Jan 13, 2009 1:14 am
by Mihai
There is no easy way to change the ior file itself, but you could perhaps blend the ior with a dielectric bsdf, search on the net for ND and abbe data for the stones you are trying to render.
Posted: Tue Jan 13, 2009 1:29 am
by caryjames
Hi Mihai- I know that the refractive index for diamond is 2.417 and the dispersion is 0.044. I do not know if the abbe number is the same as the dispersion value that I have for diamond.
Do you have a quick thought for how to blend a dielectric bsdf with the ior so that the ior values are dominant.
Thanks Mihai!
Posted: Tue Jan 13, 2009 3:28 am
by caryjames
I don't know if anyone has any use for this but after a bit of research I found a wizard that can help calculate the abbe number. Interesting stuff albeit a bit dry
.
http://abbenumber.info/index.php?group= ... material=C
I am going to have at creating a coloured diamond using the index of refraction and the abbe and see what it looks like.