Very High Definition render problem

Question

Hello all!
I have a problem (and searched the forum), but didn't found an answer.
I want shake to render a FileOut Node in a sequence of 7168px x 768px Tiff images.
I created a Cache Node just before the File Out… and after a Window Node but the resulting output is 4096x768.
I really want files with a resolution of 7168x768!

Answer 1

Page 130 of Shake4UsersManual.pdf (for the rest of the answer)
Working With Extremely High-Resolution Images
These guidelines are specifically for high-resolution images of 4K and 6K. The following discussion is based on the premise that you have a massive amount of RAM for your interactive workstation (at least 1 GB).
Although Shake works with any resolution, there is a default crop on Viewers in the interface of 4096 x 4096 pixels. This protects the user in case a zoom of 1000 is applied to a 2K plate. Instead of trying to render an enormous image, only the lower-left corner up to 4096 pixels is rendered in the interface. This is fine for normal HD or film production, but the cropping takes effect if you read in 6K IMAX plates. This limitation is only in the interface—images rendered to disk are at the uncropped full resolution.
There are two ways you can get around this safety feature.
Using Proxies
The first is to use proxies with a proxyScale of less than 1. For example, at a proxyScale of .5, you can potentially look at images up to 8K x 8K resolution.
Changing the Viewer Limits
The other workaround is to change the default Viewer limits by customizing a ui
preference file. Add the following lines:
gui.viewer.maxWidth = 4096;
gui.viewer.maxHeight = 4096;
These lines set the maximum resolution to 4K. If you want a larger resolution, enter it here.
For more information on creating and editing these preference files, see Chapter 14, “Customizing Shake.”