When working with 3D modeling in 3ds Max, imported OBJ files are commonly used for their compatibility with various software and platforms. However, these imported OBJ files can sometimes lead to performance issues when it comes to display and rendering. To maximize the performance of imported OBJ files in 3ds Max, here are some tips and techniques to consider:

1. Reduce Polygon Count: One of the most effective ways to improve display performance is by reducing the polygon count of the imported OBJ file. Use the ProOptimizer modifier to simplify the geometry and minimize the number of polygons without significantly affecting the overall appearance of the model.

2. Optimize Textures: Large and high-resolution textures can significantly impact display performance. Use software like Photoshop to optimize textures by reducing their size, resolution, and compression level. Additionally, consider using tiled textures or texture atlases to minimize the number of unique textures applied to the model.

3. Utilize LODs: Level of Detail (LOD) models can help improve performance by providing lower-polygon versions of the model at a distance. Create multiple LOD versions of the model and use 3ds Max's LOD modifier to switch between them based on the model's distance from the camera.

4. Clean Up Mesh: Imported OBJ files may contain unnecessary geometry, such as hidden elements or duplicate faces. Use 3ds Max's built-in tools like ProBoolean or optimize modifiers to clean up the mesh and remove any redundant or unnecessary geometry.

5. Instance Objects: If your scene contains multiple instances of the same imported OBJ file, consider using 3ds Max's instancing feature to create references to a single object. This reduces memory usage and can significantly improve display performance when working with complex scenes.

6. Update Graphics Drivers: Ensure that your graphics card drivers are up to date to take advantage of the latest performance optimizations and bug fixes. Check the manufacturer's website for the latest drivers and install them to improve overall display performance.

By implementing these techniques and best practices, you can maximize the display performance of imported OBJ files in 3ds Max, allowing for smoother 3D modeling and rendering experiences. Remember to regularly evaluate the performance of your scenes and make adjustments as needed to ensure optimal results.