Do you need a 3D viewer? The answer depends on your needs and interests. If you are involved in industries like architecture, engineering, or gaming, then having a 3D viewer can greatly enhance your work. It allows you to visualize 3D models in a realistic and immersive way, making it easier to assess designs and make changes. For those interested in virtual reality or augmented reality experiences, a 3D viewer is essential for experiencing these technologies to their full potential. However, if you are not involved in these industries or are not interested in VR/AR experiences, then a 3D viewer may not be necessary for you. Ultimately, the need for a 3D viewer depends on your specific use case and interests.