The lastest chapter shown that Sasuke can see the shadow version of Madara in another dimension (limbo world) using his sharrinnegan.Sasuke also inform Naruto that phyiscal attack will be useless against shadow version of Madara.However,Sasuke throw his sword at Madara shadow version which is not physical inorder to land an attack .This mean Sasuke use his sharinnegan to change dimension into limbo world in order to his the shadow madara.
I concluded that Sasuke can use the same technique to change dimension and enter kamui world.Madara also mention before Naruto and sasuke use their senjutsu combo attack that he will enter the other dimension to recieve the other eyes( See manga section of NB for the translation).Madara probably can also go to different dimension since he absorb the god tree or aka kaguya spirit because he never shown this type of feature before god tree absoption
I concluded that Sasuke can use the same technique to change dimension and enter kamui world.Madara also mention before Naruto and sasuke use their senjutsu combo attack that he will enter the other dimension to recieve the other eyes( See manga section of NB for the translation).Madara probably can also go to different dimension since he absorb the god tree or aka kaguya spirit because he never shown this type of feature before god tree absoption