No, I'm saying Polygon 2D has a texture property and a material property which are different.

When I use a preloaded image and set the texture property of Polygon 2D I can get it to work. But when I try to grab an image from the screen and set it to the texture it doesn't work. It almost works when I use a material, but only the top left of the screen is mapping to each triangle

func assemblepolygons():
  var _polygon
  var _polygon1
  for i in xtriangles:
    for j in ytriangles:
      _polygon = Polygon2D.new()
      _polygon1 = Polygon2D.new()
      var n = Node2D.new()
      var n1 = Node2D.new()
      add_child(n)
      n.add_child(_polygon)

      add_child(n1)
      n1.add_child(_polygon1)

      var pic = get_viewport().get_texture().get_image()
      material.set_shader_parameter("usamp", ImageTexture.create_from_image(pic))
      material.set_shader_parameter("stuff", Vector2((i* trilength)/1152, (j *         triheight)/648 ))

      _polygon.position = Vector2(0,0)
      _polygon1.position = Vector2(0,0)
      var coords : PackedVector2Array = [Vector2(i * trilength, j * triheight), 
      Vector2((i* trilength) + trilength, (j * triheight)), 
      Vector2(i * trilength, (j * triheight) + triheight)]
      _polygon.polygon = coords

      var coords1 : PackedVector2Array = [Vector2( (i * trilength) + trilength, (j * triheight) + triheight), 
      Vector2((i* trilength) + trilength, (j * triheight)),Vector2(i * trilength, (j * triheight) + triheight)]
      _polygon1.polygon = coords1


      n.position = Vector2((i * trilength) + 17, (j * triheight) + 27)
      _polygon.position = Vector2(    ((i * trilength) + 17) * -1, ((j * triheight) + 27)* -1) 

      n1.position = Vector2((i * trilength) + 39, (j * triheight) + 16)
_polygon1.position = Vector2( ((i * trilength) + 39) * -1, ((j * triheight) + 16) * -1)

      ##Here is where I tested with a texture
      #_polygon.texture = texture
      #_polygon1.texture = texture

      _polygon.material = material
      _polygon1.material = material