Cool thanks I give those a try On Sat, May 26, 2012 at 11:45 AM, Fredrik Pihl <[email protected]> wrote:
> Gary, > I usually over a constant color (w alpha) ranging from blue to > white/gray, depending on the type of weather and time of day in the > plate, modulated by depth. This is the scattering of light that occurs by > particles (water vapour, dust etc) in the air between the observer and the > distant object. When the particles are very tiny this scattering is highly > wavelength dependant - blue light is scattered far more then red light > (thats why the sky is blue). Bigger particles like water droplets are not > and scatter all wavelengths pretty much the same - hence - clouds and mist > come out white. > > The distant object also loses light due to the same scattering.. losing > the blue wavelengths first.. so I usually multiply with yellow thru red > modulated by the same depth. The more air and particles there is between > the object and the observer the more of the short wavelengths are scattered > and absorbed. Thats why sunsets are so beautiful :) > > refer http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/blusky.html > > To just plainly desat and grade usually works - but this approach is more > accurate to nature, and just as simple. > > I once comped a cg smoke element on a plate with a bright sky and sun, > letting the density of the smoke affect the color of the bg.. not really > noticeable ,except when the thick smoke passed in front of the sun disk > where it going redder came out beautifully realistic :) > > > > /fredd > > > On Sat, May 26, 2012 at 2:01 AM, Darren Coombes < > [email protected]> wrote: > >> Sometimes I use the noise node, using depth pass as mask. >> >> Helps if the noise is larger than smaller i reckon. >> >> then just grade the noise if need be, and comp over footage. >> >> Cheers. >> >> Darren. >> >> On 26/05/2012, at 9:16 AM, Gary Jaeger wrote: >> >> anybody have any good recipes for adding atmosphere, probably using a >> depth matte I'd guess? is it mostly a contrast thing? >> >> -- >> Gary Jaeger // Core Studio >> 249 Princeton Avenue >> Half Moon Bay, CA 94019 >> 650 728 7060 >> http://corestudio.com >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> >> >> *Darren Coombes* >> *Compositor* >> >> *www.resolutiondesign.com.au* <http://www.resolutiondesign.com.au/> >> >> >> *resolution: sydney australia* tel: *+61 2 9360 9908* fax: >> +*61 2 9360 8908* >> *22* burton st: east sydney: *2010* post office box: *614* >> darlinghurst: 1300* *abn: *3305 196 1856* >> >> *2010 Silver One Show Entertainment Award: Online Branded Entertainment * >> *2009 Gold Promax/BDA Award: Best Broadcast Design Image Spot * >> *2009 Winner Creative Review Hotshop Award: Post Production / VFX* >> *2009 Finalist Creative Review Hotshop Award: Broadcast Design* >> >> >> The information transmitted, together with the attachments, is intended >> only for the person or entity to which it is addressed and may contain >> confidential and/or priviliged material which may be subject to copyright. >> Any review, retransmission or other use of, or taking of any action in >> reliance upon, this information by persons or entities other than the >> intended recipient is prohibited. If you received this in error, please >> contact the sender and delete the material from any computer or network. No >> warranty is given by the sender that any attachments to this email are free >> from viruses or other defects. >> >> >> >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> > > > > -- > __________________________________________________ > *Fredrik Pihl - **visual effects supervisor - digital compositor* > *UNITED IMAGE CREATORS AB* > rönnvägen 11, se-14144 huddinge, sweden > +46-708-559 559 > > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > -- Gary Jaeger // Core Studio 249 Princeton Avenue Half Moon Bay, CA 94019 650 728 7060 http://corestudio.com
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