see my post at: povray.pov4.discussion.general
subject: Gamma correction of input colours/image files

the images are 4x magnified by pixel replication.


the scene file:
//===============================================

global_settings {assumed_gamma 1.0}
//global_settings {assumed_gamma 2.2}

#default {finish {ambient 1 diffuse 0}}

camera {
    orthographic
    location <0,0,1>
    look_at  <0,0,0>
    right 1*x
    up 1*y
}

box {<-0.5,-0.5,-0.2>, <0.5, 0.5,-0.1>
    pigment {rgb <1,0,1>}
}

box {<-0.3,-0.2,-0.1>, <0.3, 0.2, 0>
    rotate z*17.5
    pigment {rgb <0,1,0>}
}


//===============================================

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Attachments:
Download 'test_gamma10.png' (4 KB) Download 'test_gamma22.png' (4 KB)

Preview of image 'test_gamma10.png'

Preview of image 'test_gamma22.png'