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this wiki is no longer being updated, please refer to the new ShaderLABS wiki: https://wiki.shaderlabs.org/wiki/LabPBR_Material_Standard
This is a new format for PBR support on both shaders and resource packs, aiming to end the fragmentation of competing formats.
This new format has been created in the shaderLABS Discord (explaining the name) on the end of April 2019, and improved since. It is intended to replace all previous formats in order to achieve a more consistent support across different shaders and resource packs.
In order to simplify the transition on the texture artists end, a converter exists, allowing for an effortless transition from most older formats : https://github.com/flodri/RGBA-Formats-Converter/releases/tag/0.4