• blender has built-in GLTF support

• GLTF format
  • when exporting GLTF: it will create .bin file for geo data, .gltf for scene structure description, tex folder for textures
  • it is good for you want to replace texture later on, or just manual edit texture source path in gltf text file.
• GLB format
  • it is basically above in one packed file called GLB.

• related video
  • tons of gltf, 3d, web, openxr, webgl: https://www.youtube.com/@khronos

Material

• clearcoat property:
  • What is glTF Clearcoat? by The Khronos Group : https://www.youtube.com/watch?v=OwdmeayHAdQ