Hi Kean Hong Chew
I tried exporting 3D image as GLTF file in Discovery for Bracket_Static_Stress.dsco Sample file available in Discovery and export function worked fine for me.
Please can you confirm if you are getting this issue on specific model file or its with other files too. Please try using export function with other model files and see if you facing the same issue.
You are navigating away from the AIS Discovery experience