Create [Primitive] and specify [Patch]

Please create a [New] document.

Let's create a cube by [Primitive] command in the same way as "Create a primitive". You have not to change the size and a position.

Please select [Select] command.

Please click [Prop] in Object Panel, and Object Property will be opened.

Currently, a type of patch is [Flat].

Here, you select [OpenSubdiv] as a type of a [Patch]. And [Segment] is [4].

Please push [OK] in Object Property. A patch object by [OpenSubdiv] is displayed.

Please call [Menu > Edit > Unselect all].

Edit a patch object

Let's edit the "obj1" and modify the shape.

Select [Extrude] command, and click [Bevel] in the Sub panel. The [Angle] is [45].

Please drag the top face of the cube to extrude it. The direction of dragging is right.

When a mouse cursor is on the top face, it becomes yellow.		Drag to right.		Release a mouse button, and a beveled face is created.

Note: [Extrude] command can dent a face by dragging left.

Click [Normal] in the Sub panel.

Drag the top face in the object, and a face will be extruded.

When a mouse cursor is on the top face, it becomes yellow.		Drag to right		Release a mouse button, and an extruded face is created.

Select [Scale] command.

Drag the top face in the object to scale it.

When a mouse cursor is on the center of the handle, it becomes cyan.		The selected face is scaled by dragging.

In this way, a patch object can make a modified surface by modifying original vertices and faces.

In the next pane, a gourd will be created by modifying this object more.