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Tiling
The method of repeating a texture more than once across a polygon. A tiled texture looks best if its edges seamlessly match up with each other, top to bottom and side to side. Tiling is a common method of using the smallest texture possible to cover a large area, like a small texture of a couple bricks tiling across a large polygon, creating a big brick wall.
Need to cover in more detail: repeat edge pixels, decal, texture filtering with non-tiling textures.