About the SVBRDF dataset based on Adobe Subtance Share

[snowflakewang]

Hello, I am a student at University of Science and Technology of China. I am studying topics related to material estimation. Your work really impressed me. I would like to make some further exploration. But I meet some difficulties when preparing data. Could you please tell me how to convert data from Adobe Subtance Share into image format (such as .jpg .png)?
I went to https://substance3d.adobe.com/community-assets/ and downloaded some samples (.sbsar files). Then I put them into Unity. Unity can output material images. But it seems to lack some maps such as roughness maps, which makes me confused.

Looking forward to your reply! Thanks a lot :)