Blue Screening

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  05 May 2003
Cool Blue Screening

any1 knows about any good Tutorials on Blue Screening? i found some on the web throught search engines, but the dont talk about the Lighting or the cameras positioning. also i use an not very expensive camcorder(not digital). I heard that Depth of filed should help me composite the key colours. When i try to do so, i always get horrible effects(for this kinda of jobs i mainly use AE5.5 and to get a reasonable image i need to key the image about 8 times! 8 key color passes! damn!) is Combustion2 better for key colouring? and u guys know any tips to make the images look better? cause they really suck even with 8 passes!

btw any1 knows where i can download software that allows me to capture video from WDM entrance on at least 640x480 of resolution? cause i got interVideo2 but he crashes so many times on windows XP that its kinda hard.(and intervid3 has an annoying problem, it only saves files on 320x288 res on mpeg layer)

Hope u can help me!
  05 May 2003
blue-screening is not that easy, but it can be done. on the discreet website you can find a very good tutorial for blue-screening for combustion2. this tutorial explains some things about keying. very much depends on how you illuminate the blue material for the shooting. i usualy use indirect or diffuse lights for the caracter (min 2 lights) and one or two only for the blue background. the ideea is that you obtain a uniform blue color. if you have a uniform blue background you won't need 8 keyings, only 1.
For my latest project i also use blue screen, and i made myself the blue material (pained paper), for the shots i used 2 lights for the blue background and another 2 for the caracter. when i keyed this out i neded a bit of colour suppresing becouse of the miniDv rez.
for your analog captures i recomand the pinecle capturecards.
  05 May 2003
good hints on lighting...i was thinking of using 2 lights for the blue screen and one from the side to the actors. But if u say 2 lights for the actors are better i shall give it a try..
  05 May 2003
WOW! Matte choker is really powerful! I love it!
  05 May 2003
It is very imprortant to use some back lights for actor. This way edges are not "melted" into background and there is much less spill.

I always correct levels before keying, especialy with DV.
  05 May 2003
hy all
now, rereading this thread, I remembered.
When you illuminate the blue/green background and the carracter be verry attentive to reflections from the blue background on the caracter. if you have reflection on the skin of the for example you work to much in color correction to hide the blue tint on the skin, and it is much easyer to be attentive with the lights, you will annoy you actor, but you make your work easyer.
when you illuminate your caracter before blue background first analize the dirrection and the chacateristics of the light in the future background footage, and arrange the lights to mach. I usualy shoot the background and after the studdy of that footage I soot the blue screen, for the lighting concordance. when I am compositing I also use the light in Combustion to give a unified lighting effect.
Have fun.
  05 May 2003
Also the guys at Ultimatte have some nice information in the FAQ section:
The founder of ultimatte is like the grandfather of bluescreen technology from back when it was first invented.

Last edited by beaker : 05 May 2003 at 08:10 AM.
  05 May 2003
Hi there,

I did once a bluescreening project on my own, and you can do it! Only like the guys said, your lighting is very important. For the spill you can also use an yellow backlight, that makes the spill go away...


Dalaran AW
  05 May 2003
not much to say...

well i have not much to say except that you'll have to set up your light properly (or else you gonna get some big trouble to composite your footage)

i recently made a videoclip using a bluescreen (not flat at all cause i didn't know how to set properly the lights), just check if your bluescreen is approximatly flat (i had 2 horrible white spot on it and i had to take it out manually with AE), also as someone said check the reflection on your actors (i also had blue reflection on my actors... i had a hard time with that videoclip when i look back)

well i didn't say something special, just think that the best you'll set up your bluescreen, the faster you'll be able to work it on AE.

sorry for my bad english.

[Mr.T /KcD & BCC]
  01 January 2006
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