“Gestaltor is an essential workflow tool when dealing with glTF.Every DCC lags at one point or another when exporting glTFs. With Gestaltor you can debug the files easily, so you’re 100% sure everything looks the way you want it to.
Plus, it’s the only way to create decent USDZ files on Windows for cross-platform development!”

(https://chrisfaber.studio)

UX3D

UX3D