I have recently upgraded Art Of Illusion, which I use to make my models and I used to make glass and export it as an obj and the glass would be transparent (after having assigned a transparent texture to it). Using this new version of AOI (2.9) when I export a glass (tried it with a material and without a material) and import it into the latest version of SweetHome3D (3.4) the glass appears either gray or black, no transparency at all.

I don't know if the problem is with A.O.I. or SweetHome3D. How can I tell? And how do I fix this?