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Underwater IBLs (Read 15807 times)
rdc
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Underwater IBLs
03/01/11 at 16:07:02
 
Does anyone know where I might be able to get hold of some HDR underwater environments?
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Kel Solaar
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Re: Underwater IBLs
Reply #1 - 03/01/11 at 16:45:00
 
Hi,

I know Bob and Christian are crazy shooters but I'm not sure they got in that already Smiley

KS
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Blochi
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Re: Underwater IBLs
Reply #2 - 03/02/11 at 17:32:55
 
Well, I happen to be in Barbados right now, shooting beaches and landscapes. But I don't have an underwater housing for my Nikon, so when I read this in the morning I grabbed my GoPro and tried to swim out to the reef. I'm just a pathetic swimmer, even worse with holding a camera in my hand. The rest of the crew already left, so I'm actually afraid to get lost on high sea without anybody ever knowing.... The water is rather murky from below, and the GoPro is not really focusing or giving me any good image under water.

So, sorry. I'll probably try again with the proper gear somewhere in Venice Beach or Malibu, but it won't be a tropical reef then...


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« Last Edit: 03/02/11 at 21:10:23 by Blochi »  

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Castillonis
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Re: Underwater IBLs
Reply #3 - 03/07/11 at 02:30:06
 
Jason Buchheim would be a perfect person to consult about capturing 360 panoramas underwater.  He captured some underwater 360 panos in the Galagapos islands that were displayed on the Nova web site.  Once you learn how to capture regular panoramas underwater, it is easy to capture HDR panos.

You will need a waterproof housing and lighting gear.

http://www.3dpan.org/65153
http://www.3dpan.org/65174
http://www.3dpan.org/34815

Christian, I hope you had some time to enjoy Barbados.  I am personally jealous Wink
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Blochi
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Re: Underwater IBLs
Reply #4 - 03/07/11 at 07:29:42
 
Damn, these are excellent. That's hardcore diving stuff!

Barbados was in fact amazing, I can totally recommend it. Here's a bunch of my non-panoramic snapshots: http://www.blochi.com/photos/index.php/?/album/Barbados

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cby
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Re: Underwater IBLs
Reply #5 - 05/02/11 at 10:57:36
 
You can render out underwater panos if you want in terragen or Vue. If you want, I can show you a basic setup?

C
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Wolfgang Haak
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Re: Underwater IBLs
Reply #6 - 06/19/12 at 10:26:02
 
From my own observations (as a keen scuba diver) I'm gonna add my blurb.

360's underwater are hard enough - you'd need a waterproof housing with tripod thread (!?). Have a look here http://www.seaandsea.com/ and be in awe, then cry at the price.

Once you have that sorted, you need to weigh the equipment down, a camera in housing is more buoyant than the camera on it's own (and factor in the water's own density will reduce the resulting force generated by the weight)

If you stay close to the surface, you have good light - water absorbs the light roughly according to the spectrum  - reds go within a couple of meters, down at 20m even in the tropics you have virtually only cyan/blue left.

The images Castillonis links to compensate for the poor light by firing strobes off. Budget for that.

Near the surface of course you'll be affected more by surface swell, deeper down things can get very calm (in slackwater, unless you're in the Med where there's no tide.)

Non the less, the light and direction of the light is substantially influenced by refraction on the surface. If you want to shoot a hdr - you're out of luck, even in burst mode you won't get two pictures that vaguely overlap.

A starting point would be the attempting an "out of focus hdr", stitching from templates. You'd have chance of making it work without too many artefacts.

Just a thought...

Have a read here: http://www.uwphotographyguide.com/underwater-photography-lighting-fundamentals
and here:
http://www.divephotoguide.com/getting-started-with-underwater-photography/basic-...
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webweile
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Re: Underwater IBLs
Reply #7 - 01/07/13 at 16:40:18
 
dosch has a underwater hdri collection!
http://doschdesign.com/produkte/hdri/Underwater.html
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webweile
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Re: Underwater IBLs
Reply #8 - 01/07/13 at 17:29:20
 
found sonething interesting for you!
catlin seaview survey provides some verry nice 9.000 x 4.500 panorama images for free on their site:
http://catlinseaviewsurvey.zenfolio.com/p264097181

maby ask them for using the images for your work.
with some skills in creating hdris you can create some nice underwater hdris for less or for free. i took one image and export it from photoshop in nine steps from -6 to +2 and create a hdri file with photomatrix. here is a flash demo of the tonemapped hdr.

open this link in a new window for a full prev!
https://dl.dropbox.com/u/23671285/unterwasser_hdr_1_tonemapped_out.swf

sorry i'm not allowed to provide you the hdri because its not my work. maby ask them that costs nothing Smiley
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Blochi
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Re: Underwater IBLs
Reply #9 - 01/10/13 at 07:11:35
 
OMG - this is incredible!
These people seem very open, too. If they are freely sharing all these great panos, they may not mind sharing them wrapped up in a sIBL collection...
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webweile
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Re: Underwater IBLs
Reply #10 - 01/12/13 at 13:49:12
 
i emailed the guy and he told me to answer after his vacation Smiley
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