32 bit Floating Point EXR permits negative values. Sounds like you are getting these values from your comp and EXR is not clipping those values.
-Mason On Sep 26, 2011, at 4:24 PM, Anthony Kramer <[email protected]> wrote: > Sorry, yes, I should have mentioned that. When I write out the exr and read > it back, it still has the errors I see when just viewing the write node. > > -ak > > On Sat, Sep 24, 2011 at 4:22 PM, Sean Looper <[email protected]> wrote: > The Write node passthrough does make certain assumptions when your output is > exr. Try writing the file out and compare the written frames to your last > node. > > -sean > > Sent from my cellular device > > On Sep 24, 2011, at 2:16 PM, "Anthony Kramer" <[email protected]> > wrote: > >> NukeX 6.3v2 >> Windows 7 >> >> On Sat, Sep 24, 2011 at 2:11 PM, Anthony Kramer <[email protected]> >> wrote: >> It gets worse.. >> >> Seems like it's also calculating a few other key operations in my comp >> differently when selecting EXR as the output format in a write. Besides the >> neg values below which seem to be coming from a grade, it also makes my >> Zblur and LensDistortion look different. >> >> If I disable those 3 nodes, I get no difference between the last node and >> the write. If I enable ANY ONE of those nodes I get a slight difference in >> their calculation when viewing the write node only. >> >> Bizarre. Serves me right for working on a Saturday. >> >> -ak >> >> >> On Sat, Sep 24, 2011 at 1:06 PM, Anthony Kramer <[email protected]> >> wrote: >> So I have a fairly simple comp here and at the end when it goes to the write >> node, all of a sudden I get negative values. Take a look at the screen caps >> below and let me know if you seen anything like this. >> >> If I switch the write node to dpx/Cineon the problem goes away. If I switch >> to exr/Cineon the problem stays so it seems to be something with the >> filetype being exr, not the colorspace. >> >> -ak >> >> <image.png> >> >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
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