3D modeling in AutoCAD includes 3D solids, surfaces, meshes, and wireframe objects.
Types of 3D Models
Several types of 3D modeling are available in AutoCAD. Each of these 3D modeling technologies offer a different set of capabilities.
- Wireframe modeling is useful for initial design iterations and as reference geometry, serving as a 3D framework for subsequent modeling or modification.
- Solid modeling is efficient to use, easy to combine primitives and extruded profiles, and offers mass properties and sectioning capabilities.
- Surface modeling offers fine control over curved surfaces for precise manipulation and analysis.
- Mesh modeling provides freeform sculpting, creasing, and smoothing capabilities.
A 3D model can include combinations of these technologies, and you can convert between them. For example, you can convert a primitive 3D solid pyramid to a 3D mesh to perform mesh smoothing. You can then convert the mesh to a 3D surface or back to a 3D solid to take advantage of their respective modeling features.
View 3D Models
The most useful command to view 3D models dynamically is 3DORBIT.
In addition to changing views, you can right-click to display a shortcut menu that provides many options. The most popular options include the following:
- Change between different visual styles such as Conceptual, Realistic and X-Ray.
- Switch between parallel and perspective projection.
- Choose between standard preset views such as Top, or Front.
Apply 2D and 3D AutoCAD Commands
Most AutoCAD commands that are used for 2D operations can be applied to 3D models. For example, with the ROTATE command, you can revolve a 3D solid about an axis that's parallel with the Z axis of the UCS. To rotate the model about a different axis direction would require you to change the direction of the UCS Z axis.
There are also commands specialized for the 3D environment such as 3DROTATE, which displays a gizmo to facilitate rotation about any major axis.
The easiest command to start with is ROTATE due to familiarity, however the choice of which command to use depends on the circumstances and your preferences.
AutoCAD Keyboard Commands
Learning how to use AutoCAD keyboard commands can help you work faster and improve your efficiency. This article lists the abbreviated commands that can be used in AutoCAD (Toolbox). Toggle General Features Ctrl+G Toggle Grid Ctrl+E Cycle isometric ...
About Adding 3D Thickness to 2D Objects
Use the thickness property to give objects a 3D appearance. The 3D thickness of an object is the distance that the object is extended above or below its location in 3D. Positive thickness extends upward in the positive Z direction; negative ...
You can convert a compound object, such as a polyline, dimension, hatch, or block reference, into individual elements. You can explode a compound object, such as a polyline, dimension, hatch, or block reference, to convert it into individual ...
To Work with Comparing XREFs in AutoCAD
Use various commands and display options in the Xref Compare toolbar to review the differences between the attached xref and the referenced drawing file. Compare the Xref Changes Click View tab > Palettes panel > External References Palette. Find ...
About Comparing Differences Between Drawings in AutoCAD
Compare the current drawing either to a different drawing or compare it to a previous version of your drawing as maintained on a supported cloud account. As your design progresses, it becomes more difficult to remember what was changed from one ...