The reason the Line trace looks like a square is because of the structure of the line and the way we view it. The line is structured as a collection of three, flat 2D, planes. Two of these planes intersect perpendicularly and are parallel with the player’s line of site. The third plane is a perfect 10 unit by 10 unit square that is perpendicular to the player’s line of site and at the end of the line trace. The reason the player only sees the square at the end is because the other two planes are only 2 dimensional and when viewed from the side on are invisible, leaving the player to only see a square.
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