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3DGVRT: Vulkan-Based Mobile Gaussian Ray Tracer

#C++ #Vulkan #Ray Tracing #Ray Query #Gaussian Splatting #Mobile #Team Project

Overview

  • Period: May 2025 – June 2025
  • Type: Team project
  • Objective: Develop and optimize a Vulkan-based Gaussian ray tracer for mobile platforms.

Key Features

  • Ported NVIDIA’s 3DGRUT implementation to a Vulkan-based environment.
  • Implemented the renderer with both the Vulkan ray-tracing pipeline and the Ray Query extension and compared their performance.
  • Removed invalid Gaussian particles generated during training.

Optimization Details

  • Subdivided a single bounding-volume hierarchy into three-dimensional cells.
  • Applied the following Ray Query optimizations:
    1. Stored sorted Gaussian-particle results in shared memory.
    2. Moved a loop from the shader to host-side command-buffer recording, allowing each thread to traverse and sort the full BVH once.
    3. Collected only pixels with remaining transmittance and executed Ray Query operations for those pixels.

Result

Invalid Particle Ellimination
Invalid Particle ElliminationResult image after applying invalid particle eillimination.
Result: View-1
Result: View-1
Result: View-2
Result: View-2
Result: View-3
Result: View-3