Observer Dependent Block

The Observer Dependent Block is a block from the qCraft mod. Observer Dependent Blocks exhibit the properties of any non-fluid, non-tile entity, non-nether blocks from Minecraft. Which blocks you craft it with, and which direction you look at it from will determine which block it appears as. Walking away from the block and looking back at it will make it cycle through the block properties, depending on the direction you have moved.

Recipe
To craft the Observer Dependent Block you must place an Essence of Observation in the very center of the crafting grid. Then, place the blocks you wish for it to exhibit in the slots around it. The top center slot will make that block appear if when you look at it you are north of the block. The bottom center slot will make that block appear if when you look at it you are south of the block. The left center slot will make that block appear if when you look at it you are west of the block. The top left corner will make that block appear if when you look at it you are above the block, note that it will disappear if you are not. The bottom left corner will make that block appear if when you look at it you are below the block, note that it will disappear if you are not.

The recipe above means that the north-side-viewed block is Oak Wood Planks, the east-side-viewed block is Cobblestone, the west-side-viewed block is Grass, the south-side-viewed block is Gravel, the up-side-viewed block is Stone, and the down-side-viewed block is Moss Stone.