Mailing List AE-List@media-motion.tv ? Message #42514
From: Steve Oakley <steveo@practicali.com>
Subject: Re: [AE] shooting greenscreen & camera 'detail'
Date: Tue, 13 Mar 2012 21:42:35 -0500
To: After Effects Mail List <AE-List@media-motion.tv>
as both DP and compositer, I'll disagree. turning detail off leads to mush on your main image, and your key edges. you can always manipulate edge softness and spill reduction after the fact with all the real keyers out there. a soft edge makes for less goodness. this is especially true in more compressed formats in 4:2:0 color space

detail level also REALLY depends on your camera, filtration ( if any ) and lens choice. you HAVE to shoot tests if you don't know the camera very well. a couple quick tests will tell you what will or will not work for the particular camera you have. 

ideally for key work you shoot at 4K and low compression, but even 1080 low compression will work... I've even had good keys sometimes from EOS cameras. it so very much depends on several factors. 

clearly your camera with detail at 0 / default is probably not great.... so instead of saying default on, or completely off, I'm going to guess that -50% is probably the sweet spot for sharpness vs any coring artifacts

S

On Mar 13, 2012, at 9:32 PM, Chris Meyer wrote:

The general advice is to turn off any "detail" or sharpening parameter when shooting greenscreen. The function of that feature is often to harden edges, and you want nice, naturally soft, antialiased edges to create nicer matte lines when you key your shot and place it over another.

Unless "conventional wisdom" has changed the past few years (I haven't done a lot of keying lately).
 
 - Chris



On Mar 13, 2012, at 5:02 PM, Sharon Etter wrote:

hi
am hoping this is not OT, as it's a part of the whole After Effects keying workflow - (of which all the variations of Keylight recipes are incredibly useful) - 

when shooting, what do you folks do with your 'Detail' setting if you have a budget model HD camcorder, i.e. JVC 150?  Turn it off completely, leave at normal default, or some other setting between –1 and -7?  We find a very, very fine 'halo' often appears around lighter areas of the subject, (in the source footage) often when leaving detail at default, disabling it totally means no halo, so a cleaner key, but then other detail you want, i.e. hair has to go too - 

just curious what after effects listers do – general rules seem to suggest turning off any sharpening i.e. detail for green screen, but what love to know what you do?
ta
Sharon


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