Big GLB and GLTF

Questions
1

I am testing GLB for Facebook. So far trying to go around limitation of 3 MB. ThreeJS export of GLB seems pretty strange with image. Let say I have OBJ and it is only 400 KB, then I start adding material and texture, a couple of texture, few of them is sourcing the same file. Suddenly my file become 9 MB. Eventhough I am sure the map has been converted to JPG.

Any idea why and if there is suggestion on file size?

2

What size are the textures on their own?

It’s possible the exporter is duplicating textures when they are used multiple times. Can you confirm whether this is happening?

3

Just to be sure it’s clear — the images are packed into the GLB. So you should expect to see the GLB to be at least the size of your images.