transparent

private static List<Material> transparent = Arrays.asList(Material.LADDER, Material.LONG_GRASS, Material.DOUBLE_PLANT, Material.YELLOW_FLOWER, Material.RED_ROSE, Material.TORCH, Material.REDSTONE_TORCH_ON, Material.REDSTONE_TORCH_OFF, Material.BED_BLOCK, Material.CAKE_BLOCK, Material.CACTUS, Material.CROPS, Material.CARROT, Material.POTATO, Material.REDSTONE_WIRE, Material.REDSTONE_COMPARATOR_OFF, Material.REDSTONE_COMPARATOR_ON, Material.DAYLIGHT_DETECTOR, Material.DAYLIGHT_DETECTOR_INVERTED, Material.DIODE_BLOCK_OFF, Material.DIODE_BLOCK_ON, Material.DRAGON_EGG, Material.HOPPER, Material.LEVER, Material.STONE_BUTTON, Material.WOOD_BUTTON, Material.PUMPKIN_STEM, Material.MELON_STEM, Material.WATER, Material.LAVA, Material.STATIONARY_LAVA, Material.STATIONARY_WATER, Material.STRING, Material.STANDING_BANNER, Material.WALL_BANNER, Material.SNOW, Material.TRIPWIRE, Material.TRIPWIRE_HOOK, Material.COCOA, Material.CHEST, Material.TRAPPED_CHEST, Material.ENDER_CHEST, Material.ENDER_PORTAL_FRAME, Material.BREWING_STAND, Material.WATER_LILY, Material.SIGN_POST, Material.WALL_SIGN, Material.FLOWER_POT, Material.VINE, Material.BROWN_MUSHROOM, Material.RED_MUSHROOM, Material.PISTON_EXTENSION, Material.PISTON_MOVING_PIECE);