How to convert your Unity Terrains to (Low Poly) meshes or create Impostor Terrains with the Terrain Converter tool - Advanced - Canopy - Procedural Worlds
Creating Meshes | Package Manager UI website
Simple Mesh Voxelization in Unity – Bronson Zgeb
Deforming a mesh in Unity - LogRocket Blog
Generating Meshes at Runtime in Unity - Yarsa DevBlog