I've been having a devil of a time with this in Quartz Composer.

I wanted to analyze an image, store the information in a buffer, then use that 
buffer for subsequent iterative processing of the image (why I need to store 
the information first).

The problem is that the analysis can produce positive and negative numbers (and 
potentially under -1 or over 1) and Quartz Composer won't leave the values 
alone EVEN if I calculate them using a GLSL program inside a Render In Image 
with the flag set to Disable Color Correction. I think it simply clips off the 
negative values.

I tried compressing the range by adding 1 and dividing by 2, but that is less 
than effective. I also tried the secret preference of turning off correct Core 
Image. That had no effect, plus I can't guarantee it'll be turned off on 
another system.

Is there ANY way to store a buffer of information and access it later without 
QC diddling with it when it enters a pipe?

Thanks in advance,

Patrick
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