411 REFERENCE · Wikibooks
Brlcad/How to mged/command/r
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Creating a region from a list of shapes
The r command is used to create a region from a list of shapes. Note that the shapes must have been created in the database for the operations to work:
# Create a region named region1.r that consists of a union
# of the objects sph1.s and sph2.s
r region1.r u sph1.s sph2.s