Are there any class B's that do not look like RVs?

A fast look at my Roadtrek without any identifying decals and you see just a conversion van but if you know what to look for you will see it as an RV - AC vent in the back of the roof, fridge vent on the side, and classic RV furnace vents. Also the antenna on the roof is a big give away that there is more than a van inside. And then there is a mandated small plate on the bottom side of the van that says RV in compliance, etc.