yah gltf is becoming a standard since its an open spec, everyone can implement it.
look forward to seeing the update and fiddling with the modeler some more.
Oh, forgot to say I updated it.
By the way- it's possible the seams were caused by incorrect vertex normals calculations. I found out I made those incorrectly when I tried to apply lighting to my model. Try it now, and let me know if there are still seams. :D
ok thanks. i will check into the modelling tool again soon.