Set cullface in faces

[pulsar gazelle]

Hi 👋
I just want my texture to be double sided on this model. My project is java block/item but when I use the cullface option nothing changes

It works when I convert it to something else but I want a json block

[pliant shore]

Because cullface is for removing faces between blocks, not backface culling.

Install the double sided cube plugin, select everything (Ctrl+A), then use the option it adds to the "Tools" menu.
This will add an inverted copy to your model so it looks like it renders in both directions