MatForge - Milestones
MatForge Project Milestones
Timeline: November 3 - December 7, 2025 (5 weeks)
Milestone 1: November 12, 2025 ✅
Goal: Individual techniques working (foundations)
Status: COMPLETE - ALL OBJECTIVES MET
Achievements
Yiding Liu - QOLDS (Quad-Optimized Low-Discrepancy Sequences)
- ✅ Host-side matrix generation (base-3 Sobol’ sequences)
- ✅ Device-side GPU sampling implementation
- ✅ Path tracer integration with GUI toggle
- ✅ 47 dimensions × 243 max points
- ✅ ~700 LOC complete
Cecilia Gao - RMIP (Rectangular MinMax Image Pyramid)
- ✅ RMIP data structure builder (C++)
- ✅ GPU compute pipeline (Slang shaders)
- ✅ Vulkan integration (pipelines, descriptors)
- ✅ ~5ms build time for 4K displacement maps
- ✅ ~800 LOC complete
Xiaonan Zhang - Fast-MSX (Fast Multiple Scattering)
- ✅ Relaxed V-cavity model implementation
- ✅ Modified GGX distribution for multi-scatter
- ✅ Integration with PBR material system
- ✅ 100× energy conservation improvement
- ✅ ~350 LOC complete
Summary
- Total Code: ~1,850 lines of production code
- Status: Ahead of schedule
- All three techniques have working foundations
- Clean integration points identified
View Full Milestone 1 Report →
Milestone 2: November 24, 2025 🎯
Goal: Full pipeline integration + material system
Status: IN PROGRESS
Target Deliverables
RMIP Integration
- Complete custom intersection shader
- Inverse displacement mapping
- End-to-end ray tracing test
- Displaced plane rendering
Bounded VNDF Implementation
- Spherical cap bound computation
- Rejection rate measurement
- Integration with path tracer
- Testing with varying roughness
Material System
- Material library (7+ materials)
- Material parameter editor (ImGui)
- Comparison modes (toggle each technique)
Performance Analysis
- FPS benchmarks at multiple resolutions
- Convergence comparison (QOLDS vs PCG)
- Variance reduction measurements
- Memory usage profiling
Success Criteria
- ✅ Complete 4-technique pipeline working
- ✅ Measurable improvements from each technique
- ✅ >20 FPS at 1080p quality mode
- ✅ Material library complete
Final Presentation: December 7, 2025 📅
Goal: Production features + comprehensive analysis
Final Deliverables
Technical
- Complete implementation of all 4 SIGGRAPH papers
- Material parameter editor with live preview
- Advanced material library
- Performance optimizations
Analysis
- Comprehensive benchmarks
- Convergence analysis
- Quality comparisons
- Ablation studies (each technique on/off)
Documentation
- Demo video
- Technical paper
- Implementation documentation
- Material authoring guide
Presentation
- 10-minute presentation
- Live demo
- Q&A with technical deep-dive
Project Timeline
| Week | Dates | Focus | Status |
|---|---|---|---|
| Week 1 | Nov 3-9 | Foundation implementations | ✅ Complete |
| Week 2 | Nov 10-16 | GPU shaders and core algorithms | 🚧 In Progress |
| Week 3 | Nov 17-23 | Full integration | 📋 Planned |
| Week 4 | Nov 24-30 | Optimization and material library | 📋 Planned |
| Week 5 | Dec 1-7 | Polish and final presentation | 📋 Planned |
Expected Performance Improvements
Based on the papers, we target the following improvements:
| Technique | Metric | Expected Improvement |
|---|---|---|
| QOLDS | Variance Reduction | 15-30% |
| RMIP | Speed vs Tessellation | 11× faster |
| RMIP | Memory vs Tessellation | 3× less |
| Bounded VNDF | Rejection Rate | 15-40% fewer samples |
| Fast-MSX | Energy Conservation | 100× better at high roughness |
| Combined | Overall FPS Impact | ~6% overhead, 20-50% quality improvement |
References
Papers Implemented
- Quad-Optimized LDS: Ostromoukhov et al., “Quad-Optimized Low-Discrepancy Sequences”, ACM SIGGRAPH 2024
- RMIP: Thonat et al., “Displacement ray-tracing via inversion and oblong bounding”, ACM SIGGRAPH Asia 2023
- Bounded VNDF: Eto & Tokuyoshi, “Bounded VNDF Sampling for Smith-GGX Reflections”, ACM SIGGRAPH Asia 2023
- Fast-MSX: “Fast Multiple Scattering Approximation”, ACM SIGGRAPH 2023
Documentation
Last Updated: November 16, 2025
