Shake

Hello Guys and Gals,



I have a shot that is a night Ocean with the moon reflections in the
water, Which is BG element. I am using a defocus to match focus, but
I'm losing the Highlights( the shimmer on the ocean. I see the
boostpoint and super white settings which kinda give me what I want.


Ok now for the Question,



Any thoughts on how to save the shimmer.

Thanks for the time.





mike

Lumakey the highlights and add them back on top of the BG plate. Make
sure you add them in float to get values well above 1, say 5, and the
defocus should give you nice hot twinkles, without needing to tweak the
boostpoint.

cheers
johan

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I sometimes push the highs over 1 in float. Be careful doing this with
genarts rack defocus, it clips in float.
./sam

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cool thanks do I need to convert back from float or keep it at float.


thanks for the help


mike

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Push it over 1 and filter it in float, then do whatever you please after.

Checker1 =3D Checker(500, 500, 1, width/2, xSize/GetDefaultAspect());
Grad1 =3D Grad(500, 500, 4, 0.5, 0.5, 1, 0, 0, 1, 0, 0, 1, 0, 1,=20
0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0);
Text3 =3D Text(500, 500, 4, "...sparkle...", "Utopia Regular",=20
100, xFontScale/GetDefaultAspect(), 1, width/2, height/2,=20
0, 2, 2, 1, 1, 1, 1, 0, 0, 0, 45, 0, 1);
Over1 =3D Over(Text3, Grad1, 1, 0, 0);
Brightness1 =3D Brightness(Over1, 3);
Defocus2 =3D Defocus(Over1, 30, xPixels/GetDefaultAspect(), "rgba",=20
100, "circle", 0.95, 1);
LumaKey1 =3D LumaKey(Over1, 0.9, 0.945, 0, 0, 0);
Defocus1 =3D Defocus(Brightness1, 30, xPixels/GetDefaultAspect(),=20
"rgba", 100, "circle", 0.95, 1);
Mask(Brightness1, LumaKey1, "A", 100, 0, 1, 1);
KeyMix1 =3D KeyMix(Defocus1, Defocus2, Checker1, 1, "A", 100, 0);

Which colour space are you working in?
If video then you could:
1) convert to float
2) set gamma to 0.45 to convert to "linear to light" (tweeking this
value is similar to the superwhite setting)
3) add a gaussian blur for a simple defocus
4) reverse the gamma (2.2) to get back to video space

As long as your whites in the original plate are "white" this should
work.... famous last words!

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What colour space are you in? Got to liniar float (ie with a logLin
node if your in log or a gamma of .4545 if your in video space) and
then gamma it down some more do the defocus and then gamma back up
with the inverse value gamma and go back to you original colour space.

You want to push the bias of the defocus to the highlights. Adjust
first gamma to taste. and of course with a float defocus, be prepared
to wait.

Rand1 = Rand(1920, 1080, 1, 0.028, time);
Bytes1 = Bytes(Rand1, 4);
LogLin1 = LogLin(Bytes1, 0, 0, 0, 0, 95, rBlack, rBlack, 685,
rWhite, rWhite, 0.6, rNGamma, rNGamma, 1.7, rDGamma, rDGamma,
0, rSoftClip, rSoftClip);
Gamma1 = Gamma(LogLin1, 0.08265682, rGamma, rGamma, 1);
Defocus1 = Defocus(Gamma1, 50, xPixels/GetDefaultAspect(), "rgba",
100, "circle", 0.95, 1);
Gamma1_clone1 = Gamma(Defocus1, 1/Gamma1.rGamma,
NRiScript1.Gamma1_clone1.rGamma,
NRiScript1.Gamma1_clone1.rGamma, Gamma1.aGamma);
LogLin2 = LogLin(Gamma1_clone1, 0, 0, 0, 0, 95, rBlack, rBlack,
685, rWhite, rWhite, 0.6, rNGamma, rNGamma, 1.7, rDGamma,
rDGamma, 0, rSoftClip, rSoftClip);

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Thanks for the help


Looks great

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