As one of the oldest and most commonly used tricks in the game, Wall Clipping allows for the player to clip into solid tiles. Furthermore, it allows for many movement optimizations in the game.
The amount one can clip into a solid tile is based on the side of the tile in which they are trying to clip into:
Wall Clipping is one of the easiest tricks in the game. Simply walk into the corner of a solid tile. One of two things will happen:
Many glitches and tricks stem from - or are made easier by - wall clipping, such as Evil Genie quick kill, Super Jumping, and sideways block pushing. More often than not, however, it is used to optimize one's movement.
Left: not wall clipped; right: wall clipped