Viewing CAD files in 3D can provide a more comprehensive understanding of the design and aid in the visualization of complex structures. To view CAD in 3D, follow these steps:

1. Use CAD software: Invest in a reliable CAD software that supports 3D viewing. Popular choices include AutoCAD, SolidWorks, and CATIA. These software packages offer advanced 3D modeling capabilities that allow for interactive viewing and manipulation of CAD files.

2. Import the CAD file: Once you have the CAD software installed, import the CAD file into the program. Most CAD software supports a wide range of file formats such as .dwg, .dxf, .stp, and .iges.

3. Navigate the 3D model: Use the software's navigation tools to rotate, pan, and zoom in on the 3D model. This will allow you to explore the design from different angles and perspectives, providing a more holistic view of the project.

4. Enable viewing modes: Many CAD software programs offer different viewing modes such as wireframe, shaded, and realistic rendering. Experiment with these modes to visualize the CAD model in various representations and better understand its features and components.

5. Utilize measurement tools: CAD software often includes measurement tools that allow you to take accurate dimensions and distances within the 3D model. This can be extremely useful for verifying design specifications and ensuring that the CAD model meets the required criteria.

6. Collaborate with stakeholders: Share the 3D view of the CAD model with stakeholders and team members to gather feedback and make informed decisions. Collaborative 3D viewing can help communicate design intent and facilitate the review process.

7. Explore advanced features: Advanced CAD software may offer additional features such as animation, simulation, and virtual reality compatibility. These features can enhance the 3D viewing experience and provide valuable insights into the design's functionality and performance.

In conclusion, viewing CAD in 3D is an essential aspect of the design process, enabling engineers, architects, and designers to visualize their creations from all angles and make informed decisions. By leveraging the capabilities of CAD software and following these steps, you can efficiently view CAD files in 3D and maximize the potential of your designs.