STENCIL_COMPARISON_FUNCTION NEVER 1 LESS 2 EQUAL 3 LESS_OR_EQUAL 4 GREATER 5 NOT_EQUAL 6 GREATER_OR_EQUAL 7 ALWAYS 8 STENCIL_COMPARISON_FUNCTION: NEVER(1) LESS(2) EQUAL(3) LESS_OR_EQUAL(4) GREATER(5) NOT_EQUAL(6) GREATER_OR_EQUAL(7) ALWAYS(8)