I created a custom wall, which works fine in every aspect except for the fact that walls don't connect to each other. Here is how I initialize the wall: CHERT_BRICK_WALL = new WallBlock(Block.Properties.from(CHERT_BRICKS)).setRegistryName("chert_brick_wall"); All the JSON files are copied from vanilla: models: chert_brick_wall_post.json chert_brick_wall_side.json chert_brick_wall_inventory.json   Where could the error be? Also, how do I make creative tabs?