Hey just as written in the title my custom block side turns black if a solid block is facing that side.
I have already tried everything concerning the blockmodel.json.
I have set the ambientocclusion to false, shade to false and render_type also to cutout, but nothing seems to work.
If anything else is needed to help me with my problem don't bother to ask me for more information.
The blockmodel ingame:
Here is the blockmodel.json file: