Preparing Your 3D models
Install Maya2gltf plugin
Run the plugin by typing “maya2glTF_UI” in the MEL command line
2. Replace all materials with plugin shader GLSL materials.
Adjust PBR material settings - assign jpeg textures.
For transparency, change material from solid to transparent in the dropdown at the top.
To change environment/reflection maps, you need to install nvidia texture tools exporter (standalone / Photoshop plugin), and export .dds files of the HDRI / cubemaps you want to use
Select the geo objects that you want to export
Set export path (and optional copyright field & animation clips)
Click export
View gltf with https://gltf-viewer.donmccurdy.com/
Pack files into a GLB with https://glb-packer.glitch.me/