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Videos helps show actual wall, but there are no climbing protrusions on it yet I see, and you will have to position 2 cameras to better view the inset portion, as you probably figured.
The PS Eyes use the wide angle setting, different from the video camera used in the video, so Eyes can most likely be positioned a little closer to the wall, enough just to see the ground about 1m-2m in front of the wall and as high on the wall as it will show, the closer you can position the Eyes to the performer, the better the tracking will be, as your actor will look bigger, you will get a feel for this as you set the cams, but try to contain just the wall in the cameras views, as you won't want to show areas you won't be climbing on.
The way that wall has a jaunt in it, might require 2 cameras above looking down rotated just a bit to look at the same center point on the ground, which should have a ground center mark for best camera positioning view reference.
As for gloves, I would wear them, any solid contrasting color will work, as the wall color and possibly the grabs will be too close to the skin color of the hand and loose tracking more frequently most likely, but not easily known, unless you are tracking videos right after the filming process on-scene also, it would be a shame to get home and find the tracking loss to be awful for the hands causing extensive clean up, you know?
One other thing I have found, (if you decide to use gloves), is to use a colored duct tape, or similar, that matches the glove color and wrap the forearm a bit higher above the wrist bend, since you aren't using Move controllers this helps the tracker to keep the hand color in view during extreme wrist bends during tracking, as the wrists stay straight during this processing, if the tracker looses the color of the hands while tracking, it will fling them off, even if the forearm color is in plain view the whole time and on the long sleeve length parameter of the actor, set the hand color to also go above the wrist bend a bit more.
The use of the T-shirt over the long sleeve is basically to separate the shoulder bone tracking from the arm tracking, especially if the moves you do will be extreme, but you can try with just long sleeve, I know when I tried just a long sleeve, I didn't like the shoulder tracking, especially on body rotations, the shoulder clashed with upper body and caused hangs in the tracking.
Top camera should follow the wall angle, not just look straight down to the ground from above, and not too far out from the wall, you are using this camera as the inner body tracker to keep the body depth distance off the wall more accurate, as long as the light marker is always visible/tracked during calibration.
A single camera doesn't need to always see a body part on the video plane, as long as at least one, or more other cameras can see the body part on the video plane it will still track it, as long as the calibration process correctly detects all cameras.
Solid proper calibration is very important for best tracking results! Best to do a calibration before and after the session, once you get cameras where they will stay, any camera changes during the session will require a re-calibration and background evaluation.
If you are going to attempt to set up on the walls inside at anytime, you will of course have to adjust camera positioning to better fit those wall angles.
I am really interested in seeing your tracked outcomes... Good Luck!
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