Unless the artist (whose job should be designing the armor/scenery etc.) is also directly coding that information, no, that's an issue with the coding and how the helm interacts with its surroundings.
So, the Revan mask clipping isn't an artist thing?
Twi'lek models are quite pretty when they're not interacting with other things, because their lekku clip into everything. That's not a "art" issue, that's a coding issue. Lekku need to be programmed to move to the outside of armor/vibroswords what have you, not just sit there and clip. They don't seem to be programmed as solid objects, and, therefore, clip like mad.