I see the difference when I polar coord it, in XSI I simply rotated 90
degrees in X (in environment node) Its far from perfect, but great for my
reflections. I'm also aware that I'll need to do this for all exposures
before combining into HDR.
Ultimately I want to try using a fish eye lens instead of a chrome ball...
putting the camera face up on the floor and taking a picture, then
re-slapping that on a hemisphere. Anyone have any experience using a fish
eye lens for this?
-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of
Francois Lord
Sent: Tuesday, May 30, 2006 2:45 PM
To: XSI(at)Softimage.COM
Subject: Re: Unwrapping chrome ball pictures...
Be warned! Polar coords is not the same as a mirror ball. You can
convert from one to the other in HDRShop.
Polar coords give you a uniform resolution along a line that crosses the
center. A mirror ball has less resolution on the edges.
http://gl.ict.usc.edu/HDRShop/tutorial/tutorial4.html
See the two images on the left.
Martin Belleau wrote:
>
> Polar Coordinates! (using a strap to slap myself)
>
> Yep, this does what I'm looking for.
>
> Thanks!
>
> PS - Kim, yes, a simple image warping. that's why I didn't want to
> create something in XSI to get my 2D image.. I rather stay in a 2D
> program, it takes less time. But it is a valid workaround.
>
> Thanks!
>
> ------------------------------------------------------------------------
>
> *From:* owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] *On
> Behalf Of *Alex Arce
> *Sent:* Tuesday, May 30, 2006 1:52 PM
> *To:* XSI(at)Softimage.COM
> *Subject:* Re: Unwrapping chrome ball pictures...
>
> hmm, doesn't appear to work on HDR images, but if you apply it to your
> initial shots before you assemble and HDR?
> .alex
>
> On 5/30/06, *Alex Arce* < aa.lists(at)gmail.com
> <mailto:aa.lists(at)gmail.com>> wrote:
>
> am I wrong in thinking that photoshops Polar coordinates filter does
> exactly that?
>
>
> .alex
>
> On 5/30/06, *Martin Belleau* < mbelleau(at)skuadstudios.com
> <mailto:mbelleau(at)skuadstudios.com>> wrote:
>
> Hello! I took a few pictures of a chrome ball and would like to unwrap
> it (so I can re-apply as spherical in XSI environment node). Anyone
> have a clue as to how to do this without using HDR shop's pana ?
>
> Thanks!
>
> **Martin Belleau***
> ***FX Director***
> ***Skuad Studios***
> ***T:(514)844.3990***
> **C:(514)799.3990***
>
>
>
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