package example;

import ethanjones.cubes.block.Block;

public class MyBlock extends Block {
  
  public MyBlock() {
    super("MyMod:block/texture.png");
  }
}

package example;

import ethanjones.cubes.block.Block;

public class MyBlock extends Block {
  
  public MyBlock() {
    super("MyMod:block/texture");
  }
}

Remove .png (automatically added now)
Remove .png (automatically added now)
