Greenscreen settings.

[PixelMagic]

Hey guys. We are shooting some greenscreen plates tonight for Sci-Fest. Can you guys give me a list of settings you use when doing greenscreen on the DVX? I know you have to turn the sharpness down a bit, but how much? Any other settings would be helpful as well.

 

[shadow_dog_dx]

i think interlaced is better than progressive but it might be the other way around lol

 

[FREUDENBERG_FILMS]

What are you using to key out the greenscreen with?

 

[Motherboard]

I have ppro 1.5 built-in keyer
and AE 6.5 keylight
but haven't used'em yet :-( too lazy)
what I don't like is that AE takes it's sweet ass time to render(centrino 1.7 notebook,512 ram) it was worse on my athlon 2100 desktop w/ 1 gig o'ram

 

[twocik23]

Here's a little trick that might help. When the scene is lit and ready to go, turn on the the camera and the zebra's. Then zoom all the way in, so that the screen is completely green. If the zebra's are showing the little stripes all over the LCD (100% filled), then it is properly lit. Meaning that you won't have any hotspots. Good luck

 

[Matt Grunau]

Here's a little trick that might help. When the scene is lit and ready to go, turn on the the camera and the zebra's. Then zoom all the way in, so that the screen is completely green. If the zebra's are showing the little stripes all over the LCD (100% filled), then it is properly lit. Meaning that you won't have any hotspots. Good luck

That's a great tip. Thanks.

 

[J.R. Hudson]

Don't forget to properly expose your subject matter. You can always bring the green up later

 

[Johan_Lundberg]

Here's a little trick that might help. When the scene is lit and ready to go, turn on the the camera and the zebra's. Then zoom all the way in, so that the screen is completely green. If the zebra's are showing the little stripes all over the LCD (100% filled), then it is properly lit. Meaning that you won't have any hotspots. Good luck

Just make sure your zebras are not set to high. You don't want your greenscreen to be exposed at 100%. But sure, having the zebras set at a lower level at maybe 60-70% or so could be a way to help setting the lighting.

 

[Barry_Green]

Some clarification on twocik's comment -- what you want to do is stop down the iris so that no zebras are showing, and then gradually open the iris until you see zebras. Ideally you would go from no-zebras-at-all to instant full-screen zebras. That would mean you've lit it evenly.

If, as you gradually open the iris, zebras show up on a little portion of the screen but nowhere else, then you know you've got a hot spot there and should address it.

And you don't want to light the green screen too brightly. The brighter the screen, the more it's going to radiate green all over your subject -- at too bright of a level, the greenscreen can basically act like a giant green bounce card. Definitely not what you want. So don't overlight it, don't underlight it, but get it evenly lit. And get your subject as far away from the screen as you can, to minimize spill and to avoid casting shadows on the screen. Try to get your subject 20' away from the screen if possible.

 

[twocik23]

Yup, I left out that step. Good eye barry


Here's the video I got the tip from

http://www.dvcreators.net/products/dv_enlightenment.html#

 

[Johan_Lundberg]

Some clarification on twocik's comment -- what you want to do is stop down the iris so that no zebras are showing, and then gradually open the iris until you see zebras. Ideally you would go from no-zebras-at-all to instant full-screen zebras. That would mean you've lit it evenly.

If, as you gradually open the iris, zebras show up on a little portion of the screen but nowhere else, then you know you've got a hot spot there and should address it.

That actually makes it a great tip if you've only got the camera and lights with you.