Re: rendering large formats problem?

["Rock star" <vanhalenrock(at)gmail.com>]

Wow if this is what it seems, its fantastic. 
So to get this straight this isn't rendering the whole 
frame as you do if you use "sub region" and split the frame up.
This is actually rendering a smaller resolution :)
Look forward to trying this one :)

On 8/18/06, Thomas Helzle <xsi(at)screendream.de> wrote:

I got the following help from Mathieu and it works perfectly:
--------------------------------------------------------------
Well, I'm not sure which technique you use to render your limited area but I
believe if you play with the image resolution, the focal length and the
optical center shift, you can render regions of the image and then you could
comp them back together using Photoshop or which ever software you can use
to attach the pieces back together. If your not sure how to set your
parameters, here's what you do:

lets say you want to split you 12000x7500 render into 4 regions, you set it
up that way:
-set you resolution to half the value: 6000x3750.
-in your camera's projection plane, set the focal length to it's value *2
-set the X and Y Optical Center Shift to
        -1/2 * X Film Aperture,  1/2 * Y Film Aperture ...for the up left corner
         1/2 * X Film Aperture,  1/2 * Y Film Aperture ...for the up right corner
        -1/2 * X Film Aperture, -1/2 * Y Film Aperture ...for the bottom left
corner
         1/2 * X Film Aperture, -1/2 * Y Film Aperture ...for the bottom right
corner

render each section at half your resolution, comp them back together after
to get your 12000x7500 final image.

If still too big, you can split it in 9 regions using the following instead:
divide X and Y resolution by 3, multiply focal length by 3 and multiply your
film apertures by -1, 0 and 1 to get the Optical center shift...
Or split it in 12 regions, dividing and multiplying resolution and focal
length by 4 and using -3/2, -1/2, 1/2, 3/2 for your optical shifts...
Or split it in 25 regions, dividing and multiplying resolution and focal
length by 5 and using -2, -1, 0, 1, 2 for your optical shifts...
I think you can figure out the pattern from there.

I hope this can help.


Mathieu Leclaire
R&D Programmer
Hybride Technologies
-----------------------------------------------------------------

Limited regions are pretty useless for large scale rendering since they reserve the same memory as the full frame.
I got 16,000 pixel images to render in four tiles without trouble.

Best regards,

Thomas Helzle
www.screendream.de


On Thu, 17 Aug 2006 20:42:15 +0200, Chris Johnson <chrisj(at)topix.com > wrote:

> I'm trying to render a poster size image from a commerical for a print
> add. I got most of the passes rendered at 12000x8400. However I have a
> few passes that won't go. This is the error message I repeatedly get.
> I've tried the XSI Split render plug in and it crashes when it goes too
> render each time. The one pass I did get it to work on crashed when it
> tried to go the the FXtree to comp the tiles. Also tried rendering
> subregions and stitching it myself....still won't go. Tried on our farm
> and locally. Any suggestions. Probaly not enough information to fully
> explain the problem but this is the error I repeatedly get.
>
>
> 'WARNING : 3083 - No rendering viewer used. Image resolution exceeds
> display limit.
> 'INFO : RC   0.2  error  081001: failed to create frame buffer 0:
> C:\DOCUME~1\chrisj\LOCALS~1\Temp\XSI_Temp_1336/fb000.4.1336 (Not enough
> storage is available to process this command.)
>
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