Gamma Correction as in Poser Pro 2010 and up differs completely from the traditional approach. Vue follows an intermediate route.
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Various 3D software, like Poser and Vue, offers some functions for after-render image adjustment.
Exposure correction is available in Poser and Poser Pro, as well as in the Vue Artist range (Esprit, Studio and Complete) and in the Vue Pro versions xStream and Infinite. Its basic purpose is to adjust the brightness of the image in a way similar to the effect of widening lens diaphragm opening or of prolonged exposure time on classical celluloid film. It helps to make your image look like a photograph.
Gamma Correction is available in Poser Pro, and the in Vue Pro versions, and to a limited extend in the Vue Artist range. Its basic purpose is to adjust the image for better viewing on monitors and in print, to some extent to correct as well for the shortcomings of non-realistic lighting in 3D (more in Poser than Vue) and to make the image a bit more comfortable for the human eye.
Both corrections are somewhat similar, but are independent as well so they can be mixed, or not applied at all. They all are techniques, not religions. Use them knowledgably, with care, and with awareness of artifacts, limitations, pro’s and con’s. This articles aims to help you with that.
At first I’ll discuss the need for corrections at all, and how to make them in post. Then I’ll look in more detail to Exposure Correction as well as Gamma Correction, both to be applied after the rendering process.
At second, I’ll note that Gamma Correction comes with a companion: Anti Gamma Correction, applied before the rendering. This appears to be a tricky process with lots of side effects and artifacts. I’ll discuss these for Poser and for Vue.