Separate a mesh to groups by continous parts (elements):
- Use the Connectivity SOP node to assign each mesh primitive an integer attribute based on the continuous mesh element in belongs to.
This attribute can be named “element” or “part” for example.
- Use the GameDev Group by Attribute* node to assign each mesh primitive to a different group according to its “part” attribute (if you named it “part” that is..).
Set a group name prefix, like “part_” or “element_”. the node will generate numbered groups per each mesh part like so: “element_0”, “element_1”, “element_1″….
- Use this group separation as a filter to create whatever part-selective effect you need.
* The GameDev Group by Attribute node ships with the Game Development Toolset