This is a post by Mark Brunelli on PTC site.
One of the great new features of Creo 3.0 is its advanced support for patterns.
In Creo Parametric 3.0, the geometry pattern capability has been extended to allow users to pattern geometry across an area of topology change. This significantly improves the usage of geometry pattern and significantly improves overall productivity.
In addition, users can now reference pattern features that have been placed on any pattern instance, rather than needing to always place the features on the references of the pattern leader.
Geometry pattern includes two options that will help you create patterns of geometry over variable topology. They include the copy and attach functions.
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