Unity Ray Marching - My Sandbox for Learning Ray Marching

by Ming-Lun "Allen" Chou / AllenChou.net / @TheAllenChou / Patreon

This project has been forked into MudBun, a volumetric VFX tool for Unity inspired by Clayxels.

Features

• Smooth Boolean operations: union, subtraction, intersection.
• Heat maps: number of ray steps & number of SDF evaluations.
• Final rendered image entirely generated using compute shader.

Optimization Techniques

• Bounding volume hierarchy (BVH) using dynamic AABB trees.
• AABB query & ray query against AABB trees on GPU.

References & Resources

• How Ray Marching & Signed Distance Fields (SDF) Work
• Smooth SDF Unions
• SDF Normals
• Shadertoy
• Dynamic Bounding Volume Hierarchies (GDC 2019)
• Box2D