if someone is interested I just made a little script for this, nothing
fancy, though.
set cut_paste_input [stack 0]
version 6.1 v1
push $cut_paste_input
NoOp {
name Controller
tile_color 0x516637ff
selected true
xpos 2179
ypos 23423
hide_input true
addUserKnob {20 Master}
addUserKnob {7 offset}
offset 0.03
addUserKnob {7 gamma}
gamma 0.8
addUserKnob {26 "" +STARTLINE}
addUserKnob {7 gamma_inv}
gamma_inv {{1/gamma i}}
addUserKnob {7 offset_inv}
offset_inv {{offset i}}
addUserKnob {6 offset_reverse +STARTLINE}
offset_reverse true
}
push 0
Grade {
add {{parent.Controller.offset i}}
name Grade28
selected true
xpos 2380
ypos 23366
}
Gamma {
value {{parent.Controller.gamma i}}
name Gamma1
selected true
xpos 2380
ypos 23406
}
NoOp {
name _
label "YOUR COMP"
selected true
xpos 2380
ypos 23467
}
Gamma {
value {{parent.Controller.gamma_inv i}}
name Gamma2
selected true
xpos 2380
ypos 23593
}
Grade {
add {{parent.Controller.offset_inv i}}
reverse {{parent.Controller.offset_reverse i}}
black_clamp false
name Grade29
selected true
xpos 2380
ypos 23649
}
best
Miodrag
On 22 April 2011 14:50, Miodrag Colombo <[email protected]> wrote:
> 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
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>> >> _______________________________________________
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>
>
>
> --
>
> __Miodrag Colombo
> __PIXOMONDO / SHANGHAI
> __Features Films/Commercial
> __Lead Compositor / Salsa Teacher / Dancer
> __SHA mobile: +8618721279510
> __www.miodragcolombo.com
>
>
>
--
__Miodrag Colombo
__PIXOMONDO / SHANGHAI
__Features Films/Commercial
__Lead Compositor / Salsa Teacher / Dancer
__SHA mobile: +8618721279510
__www.miodragcolombo.com
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