I doubt GPU rendering is a problem, but I have no idea what the word "role" means in this context and what "implementing an XYZ role" means.
On Mon, Nov 9, 2015 at 2:30 AM, Troy Sobotka <[email protected]> wrote: > On Sun, Nov 8, 2015 at 5:17 PM Brecht Van Lommel <[email protected]> > wrote: > >> On Sun, Nov 8, 2015 at 6:42 PM, Troy Sobotka <[email protected]> >> wrote: >> > I have only peeked at the Cycles GPU path code, but it doesn't seem like >> > there is a terrible level of chromaticity based hacks in place? I only >> saw >> > the sRGB transfer curve hard coded? Perhaps there is a bit in the SSS >> code? >> > (Being code that makes assumptions about the RGB primaries and rolls them >> > through XYZ such as the hard-coded color temperature node.) >> >> Cycles inputs and outputs are mostly scene linear colors and it >> doesn't need to know much about that color space, but there are a >> couple exceptions. >> >> The simple changes would be in the wavelength, blackbody and sky >> texture nodes, which make some assumptions about using Rec.709 scene >> linear. An extra transformation between different scene linear spaces >> should be enough to solve that. The Blender API just needs to expose >> information about the scene linear color space so that Cycles can >> construct those transformations, which I guess are just 3x3 matrices. >> >> > I chatted with Antony at length on this and I am reasonably sure that there > is a quick and easy method to solve many of the issues in Blender while we > wait for OCIO to implement chromaticity information, which is hopefully > sooner rather than later. > > The basic solution is to implement an XYZ role. This is reasonably simple > to carve out, and smaller studios / artists with unique configurations > would simply have to take care to provide the XYZ role and assert that the > white points are aligned. > > The colour selectors and such could also leverage this role. > > Do you think it is feasible to leverage the role against Cycles for these > sorts of cases or does the GPU path provide a problem? > > With respect, > TJS > _______________________________________________ > Bf-committers mailing list > [email protected] > http://lists.blender.org/mailman/listinfo/bf-committers _______________________________________________ Bf-committers mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-committers
