Sure can:
458791351443612901.zip (1.1 MB)
If you wish to test this model on babylonjs sandbox be sure to toggle off the Ambient texture channel as AO makes models dark on babylonjs when using substance painter to export glTF.
After testing on https://gltf-viewer.donmccurdy.com/ I think I do see
the effect that the 3D manager was looking for (I’ll be sure to ask here tomorrow).
Looks like you may be right, this viewer is achieving that effect by moving the directional light with the camera.
That way it looks like the light intensity is calculated from the normal of the camera.
I guess what I have to do if I want to achieve this effect is just copy the position of the directional light from the camera’s position on each frame.
I guess that would work with spot light as well.
I’ll keep this thread posted in case I’m wrong about the falloff effect but I think that’s what the 3D artists was looking for.
Appreciate your help @donmccurdy @Mugen87