Chroma Key Shutter Angle

[Larry Chan]

hi all

 

whenever we shoot chroma key scenes, the DP changes the shutter angle from 180 degrees to 90 degrees

(normally we shoot at 25fps and 180 degrees)

i know this makes the image sharper and easier for keying

but is this a must?

 

thanks so much

[John Ealer]

It's not a must. Good compositors can easily deal with the motion blur. I personally wouldn't change the shutter angle unless you wanted the end product to have the "look" associtated with that shutter angle.

[Larry Chan]

thx so much Atavist

[David Cox]

The better you light your green / blue screen, the easier it is for your compositor to deal with motion blur. A good green screen is very flatly lit - i.e. has the same value of green right across, without folds or shadows. The reason this helps with motion blur is that such blur is effectively a gradation between the colour of the foreground object and the green. If the green itself has many shades, then the compositior is forced to set their keyers to cancel all those greens, which inevitably also cancels some of the subtle motion blur detail that falls into the same colour range.

 

David Cox

Managing Director

Baraka Post Production Ltd

www.baraka.co.uk

[Larry Chan]

thx so much

 

i'm really weak in post