This is a simple pack which replaces the standard cross pattern on iron doors and trap doors (which I always thought was a bit awkward) with a more traditional iron bar look. The pack is compatible with Programmer art and Jappa styles for whatever suits your needs, by default Jappa is enabled as that is what I see most people using, if you want the programmer art assets they are still included in the .zip, you just need to swap some files. (more details in the README text document)

If you find any bugs or have suggestions, leave them in the comments.