Modifiers  3D Modifiers
Modifier  Explanation  Input 

Extrude  Extrudes a 2D geometry along its normal (usually local Zaxis) to create a 3D geometry. 
Advanced Inputs

Cut  Creates a ‘cut’ in the target mesh at the intersection with the cut mesh. This cut can be extruded with the Extrude cut modifier to create an emboss or deboss. 

Extrude cut  Extrudes the faces that got cut with the cut modifier to create an emboss or deboss. 

Shapekey  Creates a variable geometry using linear morphing, a technique where each point (vertex) in the geometry gradually translates from one location (defined by first mesh) to another (defined by second mesh). To make this work the starting geometry and final geometry need to have the exact same amount of vertices that are in the same order in both geometries. The value inputted in the interpolation field defines by what factor each vertex is translated. So an interpolation of 0 will result in the starting geometry and value 1 will result in the final geometry. 

Group geometry  Groups two objects together. When you have two shapes that need the same values, use this to group two meshes together to use the same nodes. 

Boundary measure  Measures the boundary of geometry (in mm) along a certain axis. 

Bounding box  Makes a box with the X/Y/Z dimensions of a given geometry. This essentially creates the smallest box that is aligned with the global coordinate system and fully encompassing the given geometry. 

Connect (GHX)  Connects to an external service to execute a Grasshopper script. This node has dynamic in and outputs based on what is setup in the script. More information on how to link Grasshopper scripts can be found here: Graph Editor  Connect with Rhino Grasshopper 

Normal smooth  Visually smoothens the surface of an object. Note that it does not alter the object itself regarding export files. 
Advanced Inputs

Flip  Reverses the direction of the face normals of an object. 

Remove by selection  Remove all (un)selected faces of a geometry. 
