POV-Ray : Documentation : Tiles
  POV-Ray 3.6 Documentation Online View Texture Maps Material Maps Tiles

Earlier versions of POV-Ray had a patterned texture called a tiles texture. It used the tiles and tile2 keywords to create a checkered pattern of textures.

        tiles TEXTURE tile2 TEXTURE

Although it is still supported for backwards compatibility you should use a checker block texture pattern described in section "Texture Maps" rather than tiles textures. Texture Maps Material Maps

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