PNG transparency

Summary

Been having a hard time trying to find out if I’m doing something wrong, but does the FAB 3d viewer not support PNG alpha for transparency? When I try to use the color PNG as the file for transparency, it makes the whole piece of geometry transparent as if it were glass. If I try to use cutout, it just makes the whole piece of geometry invisible. Do I have to have a dedicated file for transparency? On Sketchfab, this worked just fine and it gave several helpful options. Models that I migrated over seem to be OK, but new models will not work correctly using the PNG. Is FAB just buggy and this will get fixed or is there some setting somewhere that I haven’t set?

What type of bug are you experiencing?

Publishing

Steps to Reproduce

Select the color PNG, which contains alpha for transparency, and put it into the opacity or cutout channel.

Expected Result

Sections of geo should have holes coming from the PNG alpha.

Observed Result

The geometry either becomes completely transparent or invisible.

Platform

Firefox

Operating System

Windows 10 home