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Advice needed for rain shoot...

 
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pstudios



Joined: 01 Jan 2008
Posts: 8

PostPosted: Wed Nov 30, 2011 10:13 pm    Post subject: Advice needed for rain shoot... Reply with quote

Hi, I know this is probably a bad idea. But various circumstances mean that the production date and location of my next shoot will likely be in daytime during a forecast of light to moderate rain and overcast. That fits with the story and cannot be changed unfortunately for various reasons (including security clearance etc).

We are shooting at an airport of planes and various equipment on the runway etc. Some from indoors and some from rooftops of one of the buildings and some from the tarmac itself. Some shots call for object tracking of planes and equipment so the planes can be "enhanced" with 3D Objects on them.

Given the weather, is this impossible? (within a somewhat lower budget and limited logistics and clearance - like we aren't going to be able to put markers on jumbo jets)...

Also, this is shot on Sony Z1 interlaced and Canon 5D Mark IIs, some of the 5D footage will be timelapse and/or tilt-shift. We will be using some dollies for some shots though the 5Ds will be tripod solves or on motorized tracks for timelapse if we can get that working in the timeframe. So Rain is my big enemy, (there will be foreground and mid and background things to track on most of the shots) but tilt-shift is also probably a huge no-no too? (I assume it is best to fake tilt-shift in post instead after the track?)

Tilt-shift is not so important for us (but nice to have as a 2nd unit) but the rain may be unavoidable. Any tips or expertise or ideas would be most welcome.

thanks for any ideas... Smile
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borgus



Joined: 30 Dec 2009
Posts: 145
Location: bremen, germany

PostPosted: Thu Dec 01, 2011 4:59 am    Post subject: Reply with quote

Hi!
I've recently tracked some shots for the new Guinness commercial with
havy rain and water on the ground - no problem (at least when you don't
have interlaced footage).

Maybe it's a good idea to shoot some widness shots of the objects you
wanna track to use them later as reference images in Syntheyes. Its always
very helpful to have diffrent viewing angles of the scene to help you get
around problematic shots.

I'm not sure what you mean with tilt-shift.... Sad

cheers, Seb
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pstudios



Joined: 01 Jan 2008
Posts: 8

PostPosted: Thu Dec 01, 2011 7:24 am    Post subject: Reply with quote

borgus wrote:
Hi!
I've recently tracked some shots for the new Guinness commercial with
havy rain and water on the ground - no problem (at least when you don't
have interlaced footage).

Maybe it's a good idea to shoot some widness shots of the objects you
wanna track to use them later as reference images in Syntheyes. Its always
very helpful to have diffrent viewing angles of the scene to help you get
around problematic shots.

I'm not sure what you mean with tilt-shift.... Sad

cheers, Seb


thanks, by "widness" do you mean witness or wide-shots at other angles? And do you mean simultaneously so that I can use a multicam shot in Syntheyes to combine for the solve? I haven't used multiple clips in one solve yet, is there a tutorial for that?

Are you saying that in your shoot rain falling did not affect the tracking? Didn't you get alot of false auto trackers? Or did you do supervised tracks and the rain didn't get in the way?

Tilt-shift is a special kind of lens that is rotated to adjust perspective and mess with depth of field. From some angles you can make things look like toys - especially with time-lapse

http://www.smashingmagazine.com/2008/11/16/beautiful-examples-of-tilt-shift-photography/

I'm on Syntheyes 2008, if I upgrade to 2011, will that help? I generally hate upgrading midproject - usually like to do it in my downtime, but if there are improvements that will help my shot then Ill do it now.

thanks for any help here. Smile
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borgus



Joined: 30 Dec 2009
Posts: 145
Location: bremen, germany

PostPosted: Thu Dec 01, 2011 8:04 am    Post subject: Reply with quote

hi!
sorry for my spelling... Wink I just ment still images or sequences from
different angles; not necessarily shot at the same time.

Search the manual for "indirect solve", it's pretty good documentated.
There's also a tutorial in the manual which guides you step-by-step.

I would never count on auto tracking when working on rainy shots. I always
give it a try and clean-up the trackers afterwards, but never assume
that's gonna be an easy game. When its really "thin" rain, then you have
a good chance, but it gets harder with big raindrops or splashes.

I'm not sure if it's necessary to update, but it's always good to have the
latest build (because of bugfixes, speed improvements etc.). The new version won't kill your workflow, so do it and be one the bright side Wink

tilt-shift:
Finally I have a word for that! Smile Tracking such shots.... good questions..
when you are 100% sure that you can reproduce it in post without compromising to much.... fix it in post. I believe it could become difficult
to track moving objects which move deep into the out-of-focus area, but
that depends on the shot.

cheers, Seb
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pstudios



Joined: 01 Jan 2008
Posts: 8

PostPosted: Thu Dec 01, 2011 8:22 am    Post subject: Reply with quote

Thanks for your advice and confirming as I suspected that rain would make deleting trackers in auto-mode a nightmare. I will also check on indirect solves, so thanks for that tip too - I am far from an expert with Synth Eyes. I am more of a generalist who dives into motion tracking on occasion as needed than a specialist.

Tilt-shift faked in post looks fake to me and the real lenses always look so much better to me, but perhaps the average non-vfx viewer can't tell? It does seem like tracking in the out of focus areas will probably be near impossible if the object goes in and out of the depth of field.

Appreciate your tips that it won't hamper my workflow - think I'll upgrade shortly. Smile
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borgus



Joined: 30 Dec 2009
Posts: 145
Location: bremen, germany

PostPosted: Thu Dec 01, 2011 9:37 am    Post subject: Reply with quote

Quote:
Appreciate your tips that it won't hamper my workflow - think I'll upgrade shortly.


Russ will like that Smile
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