Because CGI and VFX computations are best performed in linear-light, the CPD scheme has made CGI and VFX difficult.Įmergent techniques such as the OpenEXR encoding (promulgated by ILM) acquire “scene-linear” data – that is, image data is linearly related to the scene elements. That coding incorporates the technical parameters of film in particular, the S-shaped tone response and the colour crosstalk of film are built-into the image encoding. For nearly 20 years, cinema production and post-production has been based upon the conceptual model of film acquisition: Even if digitally acquired, imagery was typically processed using the Cineon/DPX model– technically, Cineon Printing Density (CPD) coding.
