The introduction to 3D modeling in Blender covers essential navigation, transformation tools, the distinction between object and edit modes, and advanced non-destructive workflows using modifiers.
- Fundamental Controls: Navigation involves using the middle mouse button to orbit, scrolling to zoom, and holding Shift + middle mouse to pan. Objects are selected with a left-click, and multiple objects can be selected by holding Shift.
- Transformations: Three primary tools for moving objects are G (Grab), R (Rotate), and S (Scale). These movements can be constrained to specific axes by pressing X, Y, or Z during the operation.
- Management: Users can add primitive mesh objects (like cubes or spheres) using Shift + A. Objects are deleted with X or the Delete key, and everything can be selected or deselected using A or double-tapping A, respectively.
- The Tab Key: This is used to toggle between Object Mode (moving the entire object and its origin point) and Edit Mode (modifying the actual physical mesh).
- Mesh Anatomy: A mesh consists of vertices (points), edges (lines), and faces (surfaces). You can switch between selecting these using the 1, 2, and 3 keys. The F key is used to "fill" or create an edge or face between selections.
- Shading: Right-clicking brings up the Object Context Menu, allowing you to choose between Shade Smooth, Shade Flat, or Shade Auto Smooth, which uses an angle-based modifier to smooth curved parts while keeping sharp edges flat.
- Extrude (E): Adds volume by pulling new geometry out of a selection.
- Inset (I): Creates a new face within the boundaries of a selected face.
- Bevel (Ctrl + B): Rounds off sharp edges or vertices (Ctrl + Shift + B).
- Loop Cut (Ctrl + R): Adds a ring of geometry around an object; the scroll wheel increases the number of cuts.
- Knife Tool (K): Allows for manual, free-form cutting into the mesh faces.
- Spin Tool: Useful for creating curved geometry, such as pipe joints, by rotating a selection around the 3D Cursor.
- Proportional Editing (O): When activated, moving one vertex also moves nearby vertices smoothly, with the area of influence controlled by the scroll wheel.
- Mesh Health: Overlapping geometry can be fixed by merging (M) vertices by distance. Shading errors often stem from "flipped normals"; checking the Face Orientation overlay (where red indicates the inside) and pressing Shift + N recalculates them to face correctly.
- Modifiers: These provide a non-destructive workflow, meaning changes aren't permanent until "applied".
- Mirror: Creates symmetrical geometry along an axis.
- Subdivision Surface: Smooths the mesh by adding geometry, creating more rounded shapes without permanently altering the low-poly base mesh.
- Combining and Splitting: Multiple objects can be joined into one using Ctrl + J, while parts of a mesh can be separated into a new object using the P key.