Re: 16bit Zdepth?

["Tim Leydecker" <BauerOink(at)gmx.de>]

Ah,

thanks guys. The nice thing is I can try this right now
in Maya, too. You´ve again helped me alot in getting
a bit(depth) better results out of mR.

Cheers

tim
----- Original Message ----- 
From: "Daniel Rind" <daniel.rind(at)gmail.com>
To: <XSI(at)Softimage.COM>
Sent: Thursday, February 22, 2007 5:40 PM
Subject: Re: 16bit Zdepth?


It's Sampling at 0 / 0, and filter size at 1 (the minimum).

Each pixel is sampled at least 22*min* times and at most 22*max* times in
each direction.

So for 0 / 0 this means 1 x 1, and for 1 / 1 it would mean 4 x 4, or 16
samples per pixel.

The filter *shouldn't* make any difference, but oddly it does. Box filtering
adds blur and shifts the whole image down and left by half a pixel (really
odd), so take triangle filtering.

Ciao, Daniel!


2007/2/22, Tim Leydecker <BauerOink(at)gmx.de>:
> Hey,
>
> thanks alot guys! I´ve had great success with a projection
> of a gradient piped into a constant shader and that one
> assigned the partition (like it simple, the backroundpartition).
>
> It´s just that rendering bit that puzzles me. To rinse and repeat,
> I use Filtering set to 0/0, or is it 1/1?
>
> That´s the bit I don´t get, how to make sure I have no AA at all.
>
> From there it´s still somewhat challenging to get the correct
> mapping (e.g. linear instead of gamma corrected) out of XSI
> but that one I should get together by rendering to float/linear.
>
> I can´t test the above today since I´m still working in Maya
> but allready do most of my personal stuff in XSI (at home) it
> would be great to also optimize that in depth once and for all.
>
> The more I have the chance to compare the apps, the less
> satisfied I am with Maya, btw. Especially when shading and
> rendering with passes in mind. Oh, boy. Additionally, it´s Maya8...
>
> Cheers
>
> tim
>
>
> ----- Original Message -----
> From: "Joe Laffey" <joe(at)laffey.tv>
> To: <XSI(at)Softimage.COM>
> Sent: Thursday, February 22, 2007 4:18 PM
> Subject: RE: 16bit Zdepth?
>
>
> > On Thu, 22 Feb 2007, Kim Aldis wrote:
> >
> >>> -----Original Message-----
> >>> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
> >>> Behalf Of Andreas Bystrom
> >>> Sent: 22 February 2007 13:25
> >>> To: XSI(at)Softimage.COM
> >>> Subject: Re: 16bit Zdepth?
> >>>
> >>> grab a scalar-state, plug that into a change_range node and finally
> >>> plug the change_range into the surface port, leave the scalar-state
> >>> settings as it is and set the  "new range start" to 0 and "new range
> >>> end" to 1 in the change range node, your old and new-range parameters
> >>> should be set to the distance where you want the depth-pass to start
> >>> and end, you can link these 2 values to nulls with an expression and
> >>> use those to control the depth-pass
> >
> >
> >> You may also find that a linear falloff isn't necessarily what you
> need.
> >> Plugging the output of the change range into a grad will allow you to
> tweak
> >> it, if you need to.
> >>
> >
> > I think the non-linear mapping would be better done in the compositor,
> though. That
> > way you have the option of linear or putting a curve on it.
> >
> > --
> > Joe Laffey                |       Visual Effects for Film and Video
> > LAFFEY Computer Imaging   |     -------------------------------------
> > St. Louis, MO             |       Show Reel http://LAFFEY.tv/?e04685
> > USA                       |     -------------------------------------
> > .                         |        -*- Digital Fusion Plugins -*-
> >
> --------------------------------------------------------------------------
> > Mail here will be rejected --> "Real Trap" <r_trap(at)laffeycomputer.com>
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