/usr/share/aqsis/examples/features/occlusion/world.rib is in aqsis-examples 1.6.0-8ubuntu1.
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 8 | AttributeBegin
Color 0.5 0.5 0.5
Polygon "P" [-10 -10 0 -10 10 0 10 10 0 10 -10 0]
AttributeEnd
AttributeBegin
Geometry "teapot"
AttributeEnd
|