.7z format specification — py7zr – 7-zip archive library
is the compressed archive for the Shulker's PBR Minecraft resource pack. It is a highly specialized community project that adds Physically Based Rendering (PBR) and parallax details to the game's default 16x textures, allowing them to react realistically to lighting. Core Project: Shulker's PBR (SPBR) spbr.7z
The extension indicates the file was compressed using the 7-Zip format. spbr.7z