Ignis Divinus

https://yijun-xiang.github.io/ignis-divinus/

Real-time 3D Fire Simulation | CS 184 Summer 2025 | UC Berkeley
Chenyang Zhang, Huachen Qu, Muze Du, Yijun Xiang

This is a 1-page summary. For detailed technical implementation and comprehensive results, please see the full report.

Accomplishments & Preliminary Results

We have successfully implemented a real-time 3D fire simulation system using GPU-accelerated fluid dynamics. Our implementation features physically-based Navier-Stokes fluid simulation, volumetric rendering with blackbody radiation, and screen-space heat refraction effects. The system achieves 30+ FPS at high quality settings with a 96³ simulation grid on consumer GPUs.

96³

Grid Resolution

30+

FPS (High)

256

Ray Steps

3000K

Max Temp

3D Volumetric Flame Rendering

$Heat Refraction Effect$

Screen-space Heat Refraction

Progress Reflection

We are on track with our proposed timeline. All baseline features from Week 1 have been successfully implemented:

✓ 3D fluid simulation with stable Semi-Lagrangian solver
✓ Volumetric ray marching with physically-based blackbody radiation
✓ Heat refraction post-processing effects
✓ Interactive GUI with real-time parameter control
✓ Performance monitoring and optimization (30+ FPS achieved)

Updated Work Plan

Week 2 Priorities:

Core Enhancements: Implement vorticity confinement for turbulence, test 128³ resolution
Visual Effects: Add GPU particle system for sparks, integrate smoke rendering
Polish: Create benchmarking suite, record demonstration video, document code

Milestone Deliverables

📹 1-Minute Video 📊 Presentation Slides 📄 Full Report

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