Gridmap Maker is a powerful tool for dynamically creating and managing small to large grid-based maps. Create your own shapes and customize them with textures, sprites, and materials as your see fit. View in Unity Asset Store here: https://assetstore.unity.com/packages/tools/level-design/gridmap-maker-288084

Here are some videos on what this API can do for you

GMM.Github.Shader.Example.mp4

GMM.Github.Video.2.-.Made.with.Clipchamp.mp4

GMM.Github.Video.3.-.Made.with.Clipchamp.mp4

Quick Showcase here: https://www.youtube.com/watch?v=o6yxsw304pM&ab_channel=Viktor Long Showcase here: https://www.youtube.com/watch?v=o6yxsw304pM

This is an extremely sophisticated but easy to use map maker, for those who want more dynamic control of their map as compared to Unity's Tilemap maker. Perfect for procedural generation, large or heavily customized maps. You can manipulate individual tiles, you use user textures, and shaders on individual or multiple tiles etc.

You can reference this website for deep documentation and how to use. https://deepwiki.com/Jamisco/Gridmap-Maker