Block Transparency in custom resource pack

Hey guys,

Can't seem to figure this one out, or find a solution.

I made a custom resource pack, back in 1.7 I believe, that made bedrock blocks transparent. I did have a specific reason for it being that way too. Worked just fine. Even migrated that world to 1.8 without it causing issue.

But starting a new world, it no longer works. Using the exact same resource pack, when I search for the block in the item menu, it shows transparent. It shows transparent in the tool tray, but when I place it, the block is black.(See attachment) In that screenshot, I have the block in question highlighted in the tool tray so you can see what I mean.

And for some blocks, I had just a portion of it transparent, like a half block, just for aesthetic reasons, but all it does is default the transparent area back to the default texture of that block.

Is transparency no longer allowed? Am I missing something obvious?

Thanks for your help.