/usr/share/radiance/marble.cal is in radiance-materials 4R0+20110410-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | {
marble.cal - classic marble pattern
A1 - Magnitude
}
marble = (1-A1) + A1*turbulence(Px,Py,Pz,.05);
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