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standing on green screen question!

Posted: Mon, 1st Dec 2008, 12:11am

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badmonk

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yo FX home peeps smile

ok i am really getting to grips now with VLS and loving it smile so thanks for an awesome piece of software!!

i have been playing with some green screen and getting some great results but one thing i would like to know, if your doing a shot of someone standing/sitting on a green screen of course they are gonna drop shadows as they are so close to the screen itself, so is the best way round this to use a freehand mask to 'clean up' the bad areas please?
or is there any other way?

thanks! biggrin
Posted: Mon, 1st Dec 2008, 1:31am

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badmonk

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oh and i have a couple green screens but pretty small! is tubetape any good for green screens please? as i like the look of their 16x20 screens! smile

have you used them please?
Posted: Mon, 1st Dec 2008, 1:52am

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Bolbi

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Rating: +1

I have a TubeTape 10x12 green screen, and I believe it is the best one you can buy for that kind of money, I have had trouble with others but as soon as I got that one it worked brilliantly. And if you don't believe me, just ask TubeTape themselves on FXHome! smile (I bet they will comment in this thread pretty shortly...)
Posted: Mon, 1st Dec 2008, 3:03am

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Prograde Productions

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try the enrode white switch, this may help, and just play around with it
Posted: Mon, 1st Dec 2008, 3:26am

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spydurhank

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what if you did want a shadow on the footage though? i know you can just copy the green screen layer and reposition and play with the grading to make it look like a shadow or reflection. do you guys think there's a way to keep the shadow on the green screen and transfer it to the background footage? that would be cool. i was about to try it and see for myself but my buddies want me to go out to a pub and drink with them.
but to answer the question i was thinking just add another Chroma key, then use the eye drop tool thing over to the shadow and key that specific color out... will that work? okay time to go drink. tard
Posted: Mon, 1st Dec 2008, 4:58am

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Axeman

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Using multiple keys is a common technique to deal with multiple colors, such as the greenscreen and then the shadows. Adjusting your lighting setup can oftentimes be helpful as well, by eliminating the shadows as much as possible, or at least reducing the contrast of them.
Posted: Mon, 1st Dec 2008, 8:06am

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spydurhank

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thanks Axeman, I just wondered if it was possible cause I just saw a movie with the oriental girl from the Charlies Angels movies. she's in front of a mirror and is not casting a reflection. if you look close you can tell that the mirror is actually a green screen cause you can see her shadow not reflection, a tad bit from the lighting. she's a vampire and is not supposed to cast a reflection but you can her see shadow, not reflection on the mirror. does that make sense? let me know if I'm missing something.
Posted: Mon, 1st Dec 2008, 8:56am

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badmonk

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thanks guys!!

yeah i have a nice piece of GS that i got while working for free, its around 5x8 but i would like the 10x16 i have seen on tube tape but i dont know if its the same material.
mine is from the drapes store @ elstree studio so its the real deal, but what exactly is the material used for professional GS's please?
Posted: Mon, 1st Dec 2008, 9:22am

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Simon K Jones

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Reflecmedia do some pretty awesome screens that use a nifty reflective system that minimises shadows. Expensive, but very effective in my limited experience. Probably be very useful for situations in which your talent is touching the material directly.

However, you can have close contact with normal greenscreens and still get away with it. Use your lighting as much as possible to minimise problems, but otherwise you'll need to use the garbage matte system to fix any glitches.
Posted: Mon, 1st Dec 2008, 9:25am

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badmonk

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cheers Tarn!!

hopefully i will meet you guys one day as me & Ad's hopefully are gonna do a short this summer, so be nice to meet the fx home boys 'n' girls smile

so what is the professional choice of material when it comes to GS please?
i am sure it aint muslin as my piece is almost like a velvet/velour type, very soft with a grey backing, and pretty thick too!
Posted: Mon, 1st Dec 2008, 9:40am

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Simon K Jones

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badmonk wrote:

cheers Tarn!!

hopefully i will meet you guys one day as me & Ad's hopefully are gonna do a short this summer, so be nice to meet the fx home boys 'n' girls smile
Sounds good! Keep us posted. smile

so what is the professional choice of material when it comes to GS please?
i am sure it aint muslin as my piece is almost like a velvet/velour type, very soft with a grey backing, and pretty thick too!
To be honest I'm not sure...I've never had the pleasure of working with expensive professional material, other than the Reflecmedia stuff.

Surely there must be a visual effects guy on set you can ask? razz
Posted: Mon, 1st Dec 2008, 9:49am

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SketchWork

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The best way to get around this is to evenly light your GS that your subject is sitting on as this is the best way of getting rid of ground shadow.

If you spend time carefully lighting your GS (both back and floor) then you'll save hours of roto work in post.
Posted: Mon, 1st Dec 2008, 10:11am

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badmonk

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thanks for the replies!!

the reflec stuff looks cool but i cant find any prices???
do you have to call them?
Posted: Tue, 2nd Dec 2008, 5:36am

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TubeTape

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Make sure to use diffused lighting to eliminate the shadows as much as possible. Sometimes we put softboxes on the floor around a subject. Both FXhome folks and ours have shot flying sequences where the subject is directly lying on the greenscreen. VisionLab handled it with no problems.

We also agree with Axeman that using multiple keys and filters works best. We will be selling a new high end green screen material soon that is extremely non reflective. It was used in Tim Burton's new Alice in Wonderland. However it will be a little pricy
Posted: Tue, 2nd Dec 2008, 8:51am

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badmonk

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hey tubetape team!!

thanks for the reply! yeah i will be very interested to see your new stuff!

when is it coming out please? and will you ship to the UK?

cheers

smile
Posted: Tue, 2nd Dec 2008, 9:49am

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SketchWork

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Hey BadMonk,

The retro-reflective stuff is available from the SketchWork web store here:

http://shop.sketchworkproductions.com/store.php/products/datavideo-data-ckl100-ckl100-led-chromakey-ring-cloth-kit

It is also a little cheaper now because of the VAT drop. But the retro-reflective stuff is a lot more pricey than your traditional greenscreen, but you get the cloth and the LED light ring.
Posted: Tue, 2nd Dec 2008, 10:56am

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badmonk

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thanks!! yeah the LED light ring looks great!! so even with bad lighting the light ring will shoot great green screen footage right?
Posted: Tue, 2nd Dec 2008, 1:11pm

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SketchWork

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Indeed it does - you can get away with not lighting the screen at all and the odd crease doesn't matter either. It does make greenscreen filming much quicker and easier if you can afford the gear. It also works at great distances too up to 20 meters.