How to get emissive textures from a substance archive (.sbsar) file to work on asset?

Hi all!

I've been working on supporting substance materials on our renderer using the amazing sbsar plugin provided here.

Substance materials look great, but the emissive textures don't look right. Here is how it looks:

But the emissive texture .png generated from the .sbsar file looks like this:

I filed an issue here from the repository where I got the sbsar plugin to support substance materials on our renderer, but I thought to repost here in case someone could help: Emissive texture not working · Issue #72 · adobe/USD-Fileformat-plugins

Please let me know of any ideas! Thank you!