In article <3B15C461.7256CCA8@x.x>, Kari Kivisalo <x@x.x> wrote:

> I remember post process stage used unclipped floats but seem like 
> it's not the case.

The post-processed image starts with clipped colors, you need to use the 
raw_image post_process to get the unclipped colors before using the 
curves filter.

-- 
Christopher James Huff - chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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