Current imported obj meshes into the app do not have any form of transparency or ability to be seen correctly on top or inside other meshes.
Not being able to set the foreground mesh or background mesh opacity makes working on reference meshes near impossible, and so would enable both fake transparency in viewport for emulating glass materials and solve an inherent issue with modelling pipelines.
Attached are three images, first showing the headache that is working with reference geo and no transparency and the second and third examples of how it would look.