Ha! No, I meant that a 2x improvement between bad texture format and an optimal texture format is less surprising than a 5.5x improvement. It's still a significant and welcome improvement, but it's not so outrageous an improvement that it arouses suspicions.
On Wed, Sep 14, 2016 at 6:20 PM, Larry Gritz <l...@larrygritz.com> wrote: > Note to self: 2x improvement is "acceptably but not outrageously faster." > Must recalibrate reactions to Søren's compliments. > > > On Sep 14, 2016, at 3:02 AM, Søren Ragsdale <sor...@gmail.com> wrote: > > > > On Mon, Sep 12, 2016 at 7:52 PM, Larry Gritz <l...@larrygritz.com> wrote: > >> Note also that this reveals that the "genuine PRMan texture" appears to >> be saving uint16... I'm not sure if that means it really is converting to >> uint16, or if it's faking it by storing half in a uint16 container (which >> would surely not behave properly for an OIIO-based texture system). >> > > Well I feel silly. I've overlooked a major difference. Maketx refuses to > put float16 data into TIFFs. The prman texture contains int16 data. > > fake_prman/lodDefault.1001.tex : 4096 x 4096, 3 channel, half tiff > (+mipmap) > real_prman/lodDefault.1001.tex : 4096 x 4096, 3 channel, int16 tiff > (+mipmap) > > I've regenerated the textures so that they're both equivalent: > > fake_prman/lodDefault.1176.tex : 4096 x 4096, 3 channel, half openexr > (+mipmap) > real_prman/lodDefault.1176.tex : 4096 x 4096, 3 channel, half openexr > (+mipmap) > > ... and the render times are close enough for me: > > fake_prman 00:45:16 > real_prman 00:42:15 > > ... as opposed to the optimized OIIO EXR textures, which are acceptably > but not outrageously faster: > > exr/lodDefault.1176.exr : 4096 x 4096, 3 channel, half openexr > > exr 00:21:14 > > Mystery solved? > _______________________________________________ > Oiio-dev mailing list > Oiio-dev@lists.openimageio.org > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org > > > -- > Larry Gritz > l...@larrygritz.com > > > > _______________________________________________ > Oiio-dev mailing list > Oiio-dev@lists.openimageio.org > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org > >
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