I don't have a very big room that would accommodate three cameras, so I am thinking that I would shoot outdoors, do you have any idea how I should calibrate the scene especially if I am shooting in the day light.

calibrating at night
tracking at day
keep around clear (or keep high light at night) in view
I'm record in room

I haven't done a session outdoors myself, but another user in these forums has, and he said he's gotten good results with it. I imagine the trick is to do it very early in the morning or during an overcast day because you will want to avoid hard/dark cast shadows on your performer. Overall, the same important rules for shooting an indoor session applies.

Calibration during daylight should be okay so long as your light isn't competing with extremely bright elements or reflections. Might be best to do this part very early in the morning just before sunrise.

Let us know how it goes. Under the right conditions, I can see how shooting outdoors can offer some advantages over shooting indoors.

G.

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Greenlaw
Artist/Partner - Little Green Dog | My Demo Reels (2013,) (2015,) (2017,) and (2019)

Watch a one minute excerpt on Vimeo now!

I think u should probably shoot in outdoors with a distinctly coloured sphere marker for calibration ( do the same waving actions as u do with the maglight bare bulb).

Then you have to post process the video inside a compositing sw like Adobe Aftereffects.This includes:

1. Do Position Tracking the sphere marker in Aftereffects and attach a bright light glow to it.Using curves / levels to bring down the lighting/ exposture of the ambience.This should mimic the look of the video as it was shot in night with a torch in hands.

2. Repeat these steps for all the cameras

3. Use this video to calibrate inipisoft scene

4. Shoot the action video asusual

Note: I haven't try this yet due to busy schedule.But to my knowledge I believe
this should work Well.If anyone try this pls give feed backs.Thanks.

A good example is 1ko's video:

Danse Kabyle - Making of Part 1

He used a mirror ball for calibrating the outdoor scenes and then adjusted the video to simulate the Maglite that iPi normally expects for calibration. If you have questions about outdoor shooting, I would ask him because he's obviously had success in this area.

BTW, you can make good cheap 'mirror ball' by mounting a giant plastic Christmas tree ornament on a stick. This is what we use in our productions. My wife bought a few of these from a Big Lots store years ago when she was teaching a lighting class at Gnomon, so I imagine you can find these seasonally or online from any store that sells holiday decorations.

Hope this helps.

G.

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Greenlaw
Artist/Partner - Little Green Dog | My Demo Reels (2013,) (2015,) (2017,) and (2019)

Watch a one minute excerpt on Vimeo now!

That's a cool idea , I never thought of...! I already have few chrome/mirror HDR balls in my studio which I usually use for 360 degreeHDR image capturing.What do u suggest....Small or big ball to use ? Anyway thanks for this quick response .

I guess this depends on how far you position the cameras. Obviously the ball needs to be large enough to be tracked, and you're essentially simulating the effect of the Maglite in 'candlestick' mode, which makes a fairly small dot of light in the video image. I would avoid the large ball if it makes a dot much bigger than that.

The nice thing about the PS3 setup is that you can get quite large with the capture space, as demonstrated in that video. You just need to be sure that the performer is suitably lit (no hard shadows,) and consistently lit (not stepping in and out of shadows.) As mentioned earlier, it's best to do outdoor shoots when it's overcast.

I suppose an area that is completely in shadow, like a parking lot in the shade of a large building or near a mountain at sunrise and sunset might work too. Just a few thoughts.

Hope this helps.

G.

_________________
Greenlaw
Artist/Partner - Little Green Dog | My Demo Reels (2013,) (2015,) (2017,) and (2019)

Watch a one minute excerpt on Vimeo now!

I tired it once. The problems was one camera had trees in the backgound, the branches moved. Another had a white camper, couldn't get a clabration on the camera with a maglight.

Dale