full body on white seamless?

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Archive 2009 · full body on white seamless?

Beverly Guhl
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p.3 #1 · full body on white seamless?

Future Man wrote:
I just realized there's a faint pink cast at the top of my photo.

I had two White Lightnings hitting the background (a somewhat dirty white wall) with an Alien Bee in a beauty dish on my model.

Was I probably just not hitting the wall evenly with the White Lightnings?

I noticed in my own tests that when I didn't get the light evenly hitting the background, the falloff would not be white since it's therefore more underexposed. My own tint seemed to be a white balance issue.

bev

Oct 27, 2009 at 09:09 PM

shatterkiss
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p.3 #2 · full body on white seamless?

A lot of times your "white" surface won't actually be white, especially when it's not seamless, and it'll also be really unforgiving of inaccurate white-balance where it starts to fall off. I've noticed that my studio's white cyc is actually a little on the warm side, and it's especially evident when I'm not trying to blow it out. This was just one light, for instance, and white-balanced to a grey card (white balance adjustment is the only editing on this):

This image is copyrighted by the owner

You can also see the telltale dark line in the arc of the sweep, since that's effectively the furthest thing from the light source. I don't mind it, as I feel it gives a spatial reference cue much like a horizon does, but it's frustrating when you don't want it there.

Oct 27, 2009 at 09:23 PM

BrianO
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p.3 #3 · full body on white seamless?

Future Man wrote: I just realized there's a faint pink cast at the top of my photo.

For some shoots, the colors of the clothes or other subject have to be exact, so using a calibrated color meter or setting WB from a gray card is called for. But for portraits and many other shots, the exact color of the subject isn't as important as the overall feeling. In that case, if you're going for a white or neutral-gray background, you can set a custom WB off the background itself under the lighting to be used, then bring in the subject after setting the WB.

You may still get variations in tone on the BG, but you shouldn't get too much of an overall color cast.

If you're getting localized color casts, look for nearby colored objects (including walls, ceiling, decorations, etc.) reflecting light onto the set.

Oct 28, 2009 at 11:18 AM


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