A Unified Real-Time Spatial and Chromatic Foveated Rendering in VR

We present a real-time, gaze-contingent foveated rendering framework for virtual reality (VR) that integrates variable rate shading (VRS), foveated mipmap, and foveated color degradation techniques, individually and in combination. Each component adaptively modulates shading rate, texture level-of-detail, and chromatic fidelity based on eye-tracked gaze position, leveraging the non-uniform acuity of the human visual system to reduce rendering cost on modern GPUs. The quantitative evaluation across diverse scenes demonstrated a reduction in rendering latency of up to 31.77%. Complementary to performance gains, the pilot study exhibited that the spatial degradation with VRS and foveated mipmap consistently outperformed the chromatic degradation within the provided visual angle.