This is probably what you’re referring to (from the Kodi wiki page about advancedsettings.xml: https://kodi.wiki/view/Advancedsettings.xml#video):
<stereoscopicregex3d>[-. _]3d[-. _]</stereoscopicregex3d>
<stereoscopicregexsbs>[-. _]h?sbs[-. _]</stereoscopicregexsbs>
<stereoscopicregextab>[-. _]h?tab[-. _]</stereoscopicregextab>
This only alteres the way Kodi triggers the switch to the 3D playback mode for playback. It doesn’t have anything to do with skins. The naming conventions are outlined in more detail in the linked post below.
For a more detailed list of what our skin supports, see here: The OSMC Skin