View Full Version : Color Spaces and Spectral Rendering

11 November 2009, 10:36 PM
mental ray Functional Overview - White Paper

Document version 1.7
September 21, 2009

... Color Spaces and Spectral Rendering
RGB colors do not provide suf®cient color frequency resolution for all applications, like lighting simulations or wavelength dependent refractions. Color calculations can therefore be performed in mental ray in a number of other, more accurate tristimulus color spaces, like CIE XYZ.

If this is not suf®cient, color can also be represented by spectra, represented by a larger number of separate frequency samples, allowing wavelength dependent optics with high accuracy.

Does someone knows something about that promising feature and why is it not available in MR for Maya? Or why is it hidden, not implemented, not supported, like always? Is it Autodesk? I really would like to know what is going at Autodesk



11 November 2009, 11:56 PM
If I am not mistaken, support for spectral rendering is already in MR, the thing is you would need to wrote your own shaders to make use of it. Dont quote me though, but im pretty sure the functionality is there.

12 December 2009, 10:14 AM
that is exactly what I thought :(

"you would need to wrote your own shaders to make use of it"

Apparently it seems, there is no competition with other render engines for Autodesk. Or what might be the reason for the enduring attitude of Autodesk: if you want Mental Ray to do something, wrote your own stuff. We wont

12 December 2009, 04:54 PM
Is there a possibility that someone already wrote needed shaders? This sounds too nice to be forgotten.

12 December 2009, 10:00 PM
well you know, it was Friday afternoon and we wanted to go fishing on the weekend and so .... yes, we have forgotten it. next time ... perhaps :wavey:

12 December 2009, 10:11 PM
yes, we have forgotten it.
Well, I'll try not to forget.

There must be some way to use this. Or so I hope...

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