An introduction to Raymarching

3-Second Blueprint (English)

1. Unlike triangle rasterization, raymarching casts per-pixel rays in a fragment shader and steps forward using Signed Distance Functions.
2. Sphere tracing safely advances each ray by the exact minimum distance to the scene until hitting a surface or reaching a step limit.
3. 3D shapes are positioned by transforming input coordinates, where non-commutative rotation/translation order and local copies are vital.