Yes, Fusion Summoning still works the same way, though there is another version of Fusion Summoning which isn't exactly counted as fusion summoning known as a Contact Fusion, where instead of using cards like Polymerization, you instead tribute, banish, or shuffle back into the deck the materials listed on the Fusion monster
Huh, I see.
And here I thought it was just an old game nobody played that'd stay the same forever xD