[Sidefx-houdini-list] H13 Linear lighting/rendering
jason.slabber at gmail.com
Fri Nov 22 02:57:57 EST 2013
Have you brought this up with SESI?
Just wondering cause we would also like to have our own control
over texture colorspace. Not just auto and linear, seems a bit limiting...
On Thu, Nov 21, 2013 at 7:32 PM, Peter Bowmar <pbowmar at gmail.com> wrote:
> Hi Craig,
> Basically Houdini assumes non-8 bit file formats are encoded sRGB so
> it linearizes them (gamma .4545) on ingestion via (for example) the
> vex texture() call. It assumes 16/32 bit are linear (gamma 1 as you
> say) and uses them straight up.
> I think it's very useful for the home user or smaller studio but we
> apply LUTs to everything and control via pipeline what textures are
> encoded as (displacement for example might be 8 bit but linear, though
> that's unusual) so SESI have added some env vars to turn it all off if
> you want to manage it yourself.
> However, in a nutshell, yes, leave your viewer at gamma 2.2 since
> renders will be "linear" i.e. gamma 1.0 internally.
> Peter B
> On 21 November 2013 09:05, Craig Hoffman <craigleehoffman at aol.com> wrote:
> > I read this in the H13 docs:
> > Linear color workflow
> > Houdini is now set up to work in a linear color space/gamma of 2.2 by
> > VEX texture functions that work on 8-bit images will now convert the
> images from sRGB colorspace to linear. You can override this with a
> variadic argument.
> > I am a little confused- isn't linear gamma '1.0'?... Or is this saying
> that it is converting everything to 1.0 internally for calculations and
> then back to work properly with 2.2 screen gamma in GL Viewport and Render
> > So should I leave my Render View at 2.2? It seemed to look better at
> 1.0 for my PBR renders...
> > Thanks,
> > Craig
> > _______________________________________________
> > Sidefx-houdini-list mailing list
> > Sidefx-houdini-list at sidefx.com
> > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
> Peter B
> --No, I am not on Facebook.
> Sidefx-houdini-list mailing list
> Sidefx-houdini-list at sidefx.com
// http://vimeo.com/user3404661/albums // http://vimeo.com/channels/naiad
More information about the Sidefx-houdini-list