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====== Principled Shader ======

From https://docs.blender.org/manual/en/latest/render/shader_nodes/shader/principled.html

We can use Node Wrangler to automatically set up the images to work with the Principled Shader all automatically.

^Alpha|0 = Transparent\\ 1 = opaque|
^IOR|Index of refraction (IOR) for specular reflection and transmission. For most materials, the IOR is between 1.0 (vacuum and air) and 4.0 (germanium). The default value of 1.5 is a good approximation for glass.|
^Metallic|Usually 0 or 1 (full metal). A value of 1.0 gives a fully specular reflection tinted with the base color, without diffuse reflection or transmission.|
^Roughness|0 = full reflective\\ 1 = no reflections\\ If feeding Reflective Image, use Invert Color? to invert the value|
^Normal|For texture, set Color Space=Non-Color, and add Vector: Normal Vector|


{{:blender:blenderprincipledshaderusewithpolligon.png?nolink|}}

{{:blender:static1.squarespace.com.jpg?nolink|}}

from https://www.blenderguru.com/tutorials/2017/6/21/how-to-use-blenders-new-ultimate-shader-principled-bsdf

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