Consider using level of detail (LOD) optimization, which scales object complexity based on distance and view angle. Then, leverage occlusion culling to hide objects outside the user's view, reducing rendering load. Implement dynamic resolution scaling to adjust graphics quality on the fly. Use texture compression, atlasing, and caching to minimize memory usage. Take advantage of multi-threading and asynchronous rendering to maximize CPU and GPU efficiency.

To reduce latency in VR apps on older hardware: Optimize Graphics Settings: Lower the resolution, disable non-essential effects, and use simpler textures to decrease the load on older systems without sacrificing too much visual quality. 🎨 Implement Predictive Rendering: Use algorithms to predict user movements, rendering frames in advance to minimize lag and provide a smoother experience. 🖥️ Streamline Code: Ensure your code is efficient, removing unnecessary processes and optimizing performance-critical sections to boost speed. ⚙️ These strategies can make your VR app more responsive and immersive, even on less powerful hardware.

The best thing to consider is optimizing VR apps in Unity for older hardware by leveraging practices for efficiency. You would want to utilize the Universal Render Pipeline (URP) for lightweight rendering and implement dynamic resolution scaling to adjust quality in real time. This could include object pooling to reduce costly instantiations and optimizing physics with simplified colliders and limited interactions. Unity's occlusion culling can also minimize GPU load by rendering only visible objects. Additionally, Unity’s Job System or Burst Compiler can offload computations to improve performance. Together, these strategies reduce latency while ensuring an immersive experience.