anchor: love.graphics.setStencilTest
  Configures or disables stencil testing.
  
  When stencil testing is enabled, the geometry of everything that is drawn afterward will be clipped / stencilled out based on a comparison between the arguments of this function and the stencil value of each pixel that the geometry touches. The stencil values of pixels are affected via love.graphics.stencil.
  love.graphics.setStencilTest( comparemode, comparevalue )
  comparemode CompareMode The type of comparison to make for each pixel.
  comparevalue number The value to use when comparing with the stencil value of each pixel. Must be between 0 and 255.
  love.graphics.setStencilTest()