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### GROUP Files

This format is obsolete, but is still accepted. It combined the functions of `INST` and `TLIST`, taking a series of transformations and a single Geom (`unit`) object, and replicating the object under each transformation.

    GROUP ... < matrices > ... unit { oogl-object }

is still accepted and effectively translated into

    INST
    	transforms { TLIST ... <matrices> ... }
    	unit { oogl-object }

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