Diffrent 3D formats and xbmc

Hello,
im am again new to xbmc (old xbox) now on my HTPC
Everything until now works like i expected it should
so i'm very pleased with the actuel setup /situation

i have 1 question bothering me with xbmc
i have diffrent 3D movies on my nas for streaming

if have side-by-side and over-underscan
both work like it should an reconised by my TV as 3D
i have a BDMV File structure for 1 of my movies the other one is an ISO File
when i play them it works but i get a standard 2D picture when i press the 3D button on my TV i get a 3D image but defently not the "real" 3D ass the side-by-side movies
so i think it's only emulated by my TV! ass it works also for standard TV channels
those 2 movies are +- 50GB in filesize

Is there a way to switch to 3D in xbmc ? like subtitles or language change
because i think xmbc reads the standrd stream

Thank you

Shaitan