I'm working on a map and I wanted to add a 3d model to potions, but it seems that minecraft handels transparency in a unique manner, where models don't render through transparent parts. I believe I've seen it done before, but I'm not sure how to pull it off.
I somehow managed to pull it off, though I'm not sure what I changed. One of the faces suddenly worked so I just clone that face and replace the old ones. I would still prefer an answer to my question though.