If you can you should look into using a photogrammetric approach for lighting,
meaning that instead of mapping your hdri to sphere you can build a proxy
version of the set (geometry) using photogrammetry or an automated modeling
program like 123catch to generate the geo (which you can clean therefor),
then you can project your hdri (images) to the geometry it will be more precise
than a spherical setup, but it is also longer to set up! And depends on the
information and images you ve got from the set.
Here is a video I saw some time ago, really cool stuff: (video is using maya
and mari btw)
its a 3 part video:
http://www.youtube.com/watch?v=1d8ypguQjFw
http://www.youtube.com/watch?v=pdEyQGzRSaQ
http://www.youtube.com/watch?v=K3nPBrESJeE
Hope that helps!
-Manuel
Subject: Re: capturing spherical HDRi's?
From: aminjahi...@yahoo.com
Date: Wed, 16 Jan 2013 14:08:14 +0000
To: x...@colorshopvfx.dk; softimage@listproc.autodesk.com
CC: softimage@listproc.autodesk.com
Slightly off topic but this is pretty interesting stuff...
http://fxguide.com/fxguidetv/fxguidetv-165-scott-metzger-on-mari-and-hdr/
J
On 16 Jan 2013, at 13:19, Morten Bartholdy <x...@colorshopvfx.dk> wrote:
We do pretty much the same - a fisheye lens shooting in 3 directions for
good overlap, 10 exposures via software control and stitch the result into a
fairly highres LatLong HDRI 360. This is good for lighting and in most cases
reflections too, but hardly enough resolution for a background. The software
control for multiple exposures makes for better quality HDRI's as clouds, cars
and pedestrians move less, and we can get in and record the HDRI in about a
10th of the time we used to without it, in all only some 5 minutes break for
the crew for one HDRI. The Director and 1st AD will be much happier too.
The chrome ball comes in to use in tight spaces where it is hard to fit in a
camera on a tripod, but it is mostly sttting and collecting dust on a shelf
these days. Mind you, if we had more time on a shoot I would like to have a
chrome ball and a grey ball and have them in front of the liveaction camera
just after the clapper - it would help setting up HDRI's and lights and balance
the whole thing faster when lighting your scenes.
Morten
Den 16. januar 2013 kl. 12:11 skrev Anthony Martin
<anthonymarti...@googlemail.com>:
These days I use the chrome ball just for light positioning reference.
For capturing the actual HDRI I'll use a fish eye lens on a DSLR, nodal ninja
attached to a tripod and then shoot between 8-10 images (including direct above
and direct below) covering the scene.
Then load these into PTGui Pro and let it stitch them into a LongLat
HDRI. Works like a charm. Both quick to do on set and quick to assemble when
you get back to the office.
Digital Tutors actually have a good set of lessons on this.
http://www.digitaltutors.com/11/training.php?pid=599&autoplay=1
On Wed, Jan 16, 2013 at 9:22 AM, Cristobal Infante
<
cgc...@gmail.com
>
wrote:
It really depends how much time you think you will have on set. Most of
the times this can be a major issue, since they may need to move the lighting
setup several times in one day and you don't want to be the guy slowing
everything down!
the chrome ball is probably the fastest method and still does the
trick. So if you need to capture a lighting setup fast this will be your best
bet. Defently worth getting one in any case (garden mirror balls).
On Wednesday, 16 January 2013, Rob Wuijster wrote:
Yes, there's a version 2 out of the book, there's a page on the
hdrlabs website explaining the book and has links to Amazon for the paperback
and ebook.
The site, forum and book are -the- main sources of information
on this.
Of course there are other sites dealing with this, but hdrlabs
has it condensed into one big package.
Rob Wuijster
E
r...@casema.nl
\/-------------\/----------------\/
On 15-1-2013 23:09, Byron Nash wrote:
I found the book HDRI Handbook really helpful on that site. I
think they have a newer version since I read it.
On Tue, Jan 15, 2013 at 4:27 PM, Paul Griswold
<
pgrisw...@fusiondigitalproductions.com
>
wrote:
Hey guys -
I've been asked to help out on the show "Film Riot", and
one of the things we were discussing is creating your own HDR images.
I know HDRLabs has a ton of great info, but I was curious
to know if anyone else had any good info or resources on the subject that I
could pass along.
It's not something I normally do, so I wanted to make sure
I was giving them up-to-date info.
Thanks,
Paul
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