Re: Unwrapping chrome ball pictures...

[Francois Lord <francoislord(at)gmail.com>]

The lightprobe projection is natively supported by mental ray and is 
called lollypop. It would only be a matter a writing an environment 
shader with that projection. however you would still need to convert the 
mirror ball picture to light probe format.
If someone knows the calculation required in this conversion (HDRShop is 
not open source, unfortunately), it might be possible to have the birror 
ball projection directly in the shader.

Martin Belleau wrote:
> That's a very good question... In another software package, for HDR, they
> have  "Light Probe" as a projection which automatically unwraps the image.
>
> Is it possible to do this with an existing Node?
>
>
>
> -----Original Message-----
> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of
> Joe Laffey
> Sent: Thursday, June 01, 2006 10:12 AM
> To: XSI(at)Softimage.COM
> Subject: RE: Unwrapping chrome ball pictures...
>
> On Thu, 1 Jun 2006, Stuart Hall wrote:
>
>   
> > If taking it from a shiny ball, is there a way to set up a probe
> > projection so no unwrapping needs to take place?
> >
> > Has anyone made such a node? It is there in other software.
> >
> > I wonder if someone clever enough to do so would be kind enough to do
> > one....
> >
> >     
>
>
> http://gl.ict.usc.edu/HDRShop/tutorial/tutorial5.html
>
> Then HDRShop can convert this into a spherical map if you need one.
>
> --
> Joe Laffey                |       Visual Effects for Film and Video
> LAFFEY Computer Imaging   |     -------------------------------------
> St. Louis, MO             |       Show Reel http://LAFFEY.tv/?e01296
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