U+1FB9A "🮚" Upper and Lower Triangular Half Block Unicode Character

U+1FB9A "🮚" Upper and Lower Triangular Half Block is a graphic symbol from the Symbols for Legacy Computing Supplement block, designed to represent a geometric shape that fills a square cell with two right triangles, one in the upper half and one in the lower half. This character is part of a set of block and mosaic elements used for creating pixelated or tile based graphics, often emulating the display output of old computer systems, terminals, or text mode art. Visually, it appears as a rectangle split diagonally from the top left to the bottom right, forming a dark upper left triangle and a dark lower right triangle, with the opposite corners left empty or transparent. Its primary function is to allow for fine grained shading, pattern creation, or character based diagramming in plain text environments where more advanced graphics are not available.