anchor.diff:              (Level.createFlats i lvl, s)
           )
   
  -
  -
       // Add entity system
   
       let app = Renderer.init ()
  
positive.code:                 let height = Array2D.length2 tex.Data
  
                  let lightLevel = sector.LightLevel
                  let lightLevel =
                      if lightLevel > 255 then 255uy
                      else byte lightLevel
  
negative.code:             let uv = Flat.createUV 64 64 polygon
  
              let lightLevel = sector.LightLevel
              let lightLevel = lightLevel * lightLevel / 255
              let lightLevel =
                  if lightLevel > 255 then 255uy
                  else byte lightLevel
  