918989956/understanding-raymarching

A project that wishes to demystify the beautiful world of volumetric raymarching

Understanding Raymarching

A Unity (so far) project that attempts to demystify the beautiful world of Volumetric Raymarching, by splitting a typical ray-marching pipeline in explicit steps, and executing them in parallel on the CPU (using Unity's Job System & Burst Compiler).

By executing the individual steps of a RayMarching Pipeline on the CPU, instead of the usual way that is purely GPU-based, one loses performance but (hopefully) gains insight, and the ability to more closely observe, debug, and visualize what is going-on behind the scenes.

In a sense, it's like pulling the break, and taking things slow and steady.

Passes Implemented so far

• Volume Texture Proxy Generation
• Camera Ray Generation
• Ray-AABB Intersection
• Ray-Marching
• Sphere-Marching
• Cone-Marching
• Density Accumulation

References

WIP

• Sebastian Aaltonen - Making Of Claybook
• Inigo Quilez - Raymarching SDFs
• Inigo Quilez - Rendering Worlds with Two Triangleswith raytracing on the GPUin 4096 bytes
• Keenan Crane - Ray Tracing Quaternion Julia Sets on the GPU
• Adrian Biagioli - Raymarching Distance Fields: Concepts and Implementation in Unity