If you're someone who regularly works with 3D graphics or designs, having a 3D viewer on your PC can be a valuable asset. 3D viewers allow you to open, view, and manipulate 3D models and animations, providing a better understanding and analysis of your projects. Whether you're a graphic designer, architect, or a gaming enthusiast, a 3D viewer can enhance your experience and productivity. However, if you rarely work with 3D content, the need for a 3D viewer may not be as crucial for your PC. Most operating systems and software applications come with built-in 3D viewing capabilities, and for basic tasks, these may suffice. Consider your specific use case and determine if investing in a standalone 3D viewer is necessary for your PC. In conclusion, the necessity of a 3D viewer on your PC depends on your professional or personal requirements. For some, it's an indispensable tool, while for others, the built-in functionalities may be sufficient. Assess your needs and usage patterns to make an informed decision on whether you need a 3D viewer for your PC.