Blender 2.79 pdf
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Blender 2.79-branch Manual ... (PDF) included changes in specular intensity with light direction and more accurately positioned highlights on a surface. ...
Grading Your Work. Given that images generated under Cycles are scene referred, many nodes in Blender, being broken, will not work properly. This may have been hidden if one used a range that perfectly mapped to the display referred domain such as the sRGB transfer function, however using a proper camera rendering transform exacerbates this brokenness.