Re: Re[4]: HDR \ AO pass

["Adrian Lopez" <liquidlightdigital(at)gmail.com>]

My question is how does one handle transparent surfaces with AO, which only render solid in an AO pass, thus yielding and inaccurate and useless AO render.

Adrian L.

On 5/19/06, Tim Leydecker <BauerOink(at)gmx.de> wrote:

Hi Chris,

open the XSI help and search the index for HDRI.

Have a look at (especially) the entry >HDRI, lighting a scene with

For free (non-commercial use) HDRI images for testing,
search google for Paul Debevec, you´ll find several *.hdri
images somewhere on his site(s). To get the best out of
those, have a look at hdrshop.exe (also somewhere on
his site, or linked). The version 1 is free for non-commercial
use as well.

Cheers

tim



----- Original Message -----
From: "Chris" <walksfar(at)netscape.ca>
To: "Manny Papamanos" <XSI(at)Softimage.COM >
Sent: Friday, May 19, 2006 4:34 AM
Subject: Re[4]: HDR \ AO pass


> Hello Manny, wait, so your saying render out a regular pass, then
> render out just a pass with HDRI and (no adding the AO yet) comp the
> two together but making sure that HDRI is OFF on one of the passes?
>
> Christopher
>
>
> Thursday, May 18, 2006, 12:59:59 PM, you wrote:
>
>> HDR PASS is the base image in the attachment it is made with New
> Pass>>>Image Based Lighting, add uses an HDR image, you can find an hdri
>> map on the net... You must Enable Final gathering in the render
>> options/region opts.
>> Many may start their "beauty" pass with a conventional ray trace pass
>> with lights and traced shadows...
>> Then add the HDR pass = Image based lighting pass with an HDRI
>> environment map.
>> Then add AO.
>
>> Manny Papamanos
> CREATE>>SOFTIMAGE>XSI
>
>
>> -----Original Message-----
>> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf
>> Of Chris
>> Sent: Thursday, May 18, 2006 12:39 PM
>> To: Manny Papamanos
>> Subject: Re[2]: HDR \ AO pass
>
>> Hello Manny, I see your example, but how do you setup a HDR pass can
>> you even ? Or in those examples do you have a HDR image as a
>> enviroment then just render it out, then create a AO pass?
>
>> Christopher
>
>
>> Thursday, May 18, 2006, 12:11:53 PM, you wrote:
>
>>> Pretty straight forward...
>>> Usually use HDR as an environment map.. that way objects pick up fine
>>> detail/color levels in their reflections. You can also use HDR images
> with New Pass>>>Image Based Lighting this is combined with FG so the
>>> "lighting" comes out of the HDR map for photoreal results.
>>> Use the AO pass to add subtle shadow hints in comp that FG or trace
>>> don't pick up, use this as a grey mask for a black base color when
>>> comping. Test this on a grid and sphere on top of it, add it to a
>> group
>>> and put the AO shader on the group or make a pass.
>>> I have tested these two methods on my spare time and have attached an
>>> image as an example;)
>
>
>>> Manny Papamanos
> CREATE>>>SOFTIMAGE>XSI
>>>
>
>>> -----Original Message-----
>>> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
>> Behalf
>>> Of Chris
>>> Sent: Thursday, May 18, 2006 7:55 AM
>>> To: XSI(at)Softimage.COM
>>> Subject: HDR \ AO pass
>
>>> Hello, anyone know where I can get info on setting up both of these
>>> kinds of passes? I have been searching 'the base' and other resouces
>>> just to find deadlinks.
>
>>>  Christopher
>
>
>>> ---
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>
>
>
>
>
>
> --
> Best regards,
> Chris                            mailto:walksfar(at)netscape.ca
>
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