For high-quality meshes #Tesselation was the most common #Displacement method for years (in addition to various Deep Parallax and Raymarching techniques). So, Adobe decided to reimagine the whole idea with Tessellation-Free Displacement Mapping for #RayTracing

https://perso.telecom-paristech.fr/boubek/papers/TFDM/

(you can download and review some of their files)