How do I make the block pass light with the texture pack

Question

My question is not how to set block texture transparent. Let's say I have obsidian. I want to obsidian pass light like glass. When I build an obsidian home everywhere going to be dark. I want the outside light to come in, like on the glass block.

I need to do this with texture pack or data pack. Can I do this?

Answer 1

You can simply use a transparent block like glass and just replace the texture with obsidian.

Obsidian:

Glass w/ obsidian texture: