The Vader's Dirty Programmer Bricks Pack is an add-on that will add eight random brick textures to your game. You can find the textures in the game by searching for "Vader's" Bricks. The reason the developer chose to make this mod is because they wanted to give users more options in the game.

The developer knows that players like to create their own worlds and they wanted to give the users more possibilities to make those worlds look more realistic.

The textures can be found in the textures tab of the settings.