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3D Commands in AutoCAD AutoCAD provides a robust set of commands for creating and manipulating 3D objects. Here are some essential 3D commands, along with their explanations, syntax, and examples. 1. EXTRUDE Purpose: Converts 2D objects into 3D solids by stretching them along a specified path. Syntax: EXTRUDE <object> <height> Example: EXTRUDE P1 50 This command will extrude the polyline P1 to a height of 50 units, creating a 3D solid. 2. REVOLVE Purpose: Creates a 3D solid by revolving a 2D object around an axis. Syntax: REVOLVE <object> <axis_start_point> <axis_end_point> <angle> Example: REVOLVE P1 0,0 0,1 360 This command will revolve the polyline P1 around the Y-axis (defined by 0,0 to 0,1) through 360 degrees. 3. SWEEP Purpose: Creates a 3D solid or surface by sweeping a 2D object along a path. Syntax: SWEEP <object> <path> Example: SWEEP P1 P2 This command will sweep the polyline P1 along the path defined by polyline P2. 4. LOFT Pu