Thanks for this tips, very handy. best
Miodrag On 22 April 2011 10:34, Ned Wilson <[email protected]> wrote: > So, after your read node, drop a grade node in the tree. Set the offset to > .03. This will make everything washed out, so set your gamma to, say, 0.8. > Season to taste with this. When you get it dialed, take the same grade node, > copy it, and paste it right before your write node. Open up the node to view > the properties, and put a check in the "reverse" box. > > When working with the footage, it's going to look slightly different than > the original plate, and a little lifted. This won't matter, you'll be > reversing the grade out at the end of your comp, so your VFX supe won't know > the difference, and your negative code values will be preserved. > > > On Apr 21, 2011, at 7:17 PM, Hugo Leveille wrote: > > > Degraining step involve more data on the server and quality loss at some > point > > > > Might be acceptable on some project, but with some project where the vfx > sup won't even watch the comp in dailies if there is a difference with the > original plate (figurely speaking) it won't do it > > > > > > > > > > > > > > > > > > -- > > Hugo Leveille > > Compositing TD > > Vision Globale > > [email protected] > > > > Sent from my iPhone > > > > On Apr 21, 2011, at 10:08 PM, "Brad Friedman" <[email protected]> wrote: > > > >> Proper grain management includes a degraining step and a regrain step. > >> > >> On Apr 21, 2011, at 10:05 PM, chris <[email protected]> wrote: > >> > >>> On 4/21/11 at 3:18 AM, [email protected] (Brad Friedman) wrote: > >>>> You probably should not even be applying a grade node > >>>> before grain management. No sense color correcting values > >>>> that are chemical noise. The question is: what is your > >>>> d-min value after proper degraining? > >>> > >>> actually in this case we want to keep the grain, that's why > >>> it's shot on film ;) > >>> > >>> and i don't want to color correct it, i just want to keep it > >>> unaffected through the pipeline. obviously if the sub 95 > >>> values are clamped by the filmrecorder in the end, then this > >>> is a moot point (guess the only way to be sure is to ask the > >>> guys who are operating the recorder) ... but there are still > >>> situations where we want to keep the unclipped data, even if > >>> it's only grain texture (like adding a lens flare, which > >>> would bring up the sub 95 values to something visible). > >>> > >>> ++ chris > >>> > >>> ps: tried to build the pdx formulas in nuke if anybody is > >>> interested in playing around.. hope i didnt mess things up: > >>> > >>> set cut_paste_input [stack 0] > >>> push $cut_paste_input > >>> Expression { > >>> temp_name0 pdxLogReference > >>> temp_expr0 455 > >>> temp_name1 pdxDensityPerCodeValue > >>> temp_expr1 0.002 > >>> temp_name2 pdxNegativeGamma > >>> temp_expr2 0.6 > >>> temp_name3 pdxLinReference > >>> temp_expr3 0.18 > >>> expr0 "pow(10, ((red * 1023 - pdxLogReference) * > pdxDensityPerCodeValue/pdxNegativeGamma)) * pdxLinReference" > >>> expr1 "pow(10, ((green * 1023 - pdxLogReference) * > pdxDensityPerCodeValue/pdxNegativeGamma)) * pdxLinReference" > >>> expr2 "pow(10, ((blue * 1023 - pdxLogReference) * > pdxDensityPerCodeValue/pdxNegativeGamma)) * pdxLinReference" > >>> name pdxLog2Lin > >>> selected true > >>> xpos -430 > >>> ypos -118 > >>> } > >>> Expression { > >>> temp_name0 pdxLogReference > >>> temp_expr0 455 > >>> temp_name1 pdxDensityPerCodeValue > >>> temp_expr1 0.002 > >>> temp_name2 pdxNegativeGamma > >>> temp_expr2 0.6 > >>> temp_name3 pdxLinReference > >>> temp_expr3 0.18 > >>> expr0 "(pdxLogReference + log10( max( red, 0.00000001 ) / > pdxLinReference )*pdxNegativeGamma/pdxDensityPerCodeValue) / 1023" > >>> expr1 "(pdxLogReference + log10( max( green, 0.00000001 ) / > pdxLinReference )*pdxNegativeGamma/pdxDensityPerCodeValue) / 1023" > >>> expr2 "(pdxLogReference + log10( max( blue, 0.00000001 ) / > pdxLinReference )*pdxNegativeGamma/pdxDensityPerCodeValue) / 1023" > >>> name pdxLin2Log > >>> selected true > >>> xpos -430 > >>> ypos -74 > >>> } > >>> > >>> _______________________________________________ > >>> Nuke-users mailing list > >>> [email protected] > >>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > >> _______________________________________________ > >> Nuke-users mailing list > >> [email protected] > >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > > Nuke-users mailing list > > [email protected] > > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > _______________________________________________ > Nuke-users mailing list > [email protected] > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > -- __Miodrag Colombo __PIXOMONDO / SHANGHAI __Features Films/Commercial __Lead Compositor / Salsa Teacher / Dancer __SHA mobile: +8618721279510 __www.miodragcolombo.com
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