anchor.diff:                        Elevation = entity.GetElevation world
                         Flags = entity.GetFlags world }
                   let fillBarColor = if entity.GetEnabled world then Color.White else entity.GetDisabledColor world
  +                let borderImage = entity.GetBorderImage world
  +                let fillImage = entity.GetFillImage world
                   World.enqueueRenderMessage
                       (LayeredDescriptorsMessage
                           [|{ Elevation = borderSpriteTransform.Elevation
                               PositionY = borderSpriteTransform.Position.Y
  -                            AssetTag = entity.GetBorderImage world |> AssetTag.generalize
  +                            AssetTag = AssetTag.generalize borderImage
                               RenderDescriptor =
                                   SpriteDescriptor
                                       { Transform = borderSpriteTransform
                                         Offset = Vector2.Zero
                                         InsetOpt = None
  -                                      Image = entity.GetBorderImage world
  +                                      Image = borderImage
                                         Color = fillBarColor
                                         Glow = Color.Zero
                                         Flip = FlipNone }}
                             { Elevation = fillBarSpriteTransform.Elevation
                               PositionY = fillBarSpriteTransform.Position.Y
  -                            AssetTag = entity.GetFillImage world |> AssetTag.generalize
  +                            AssetTag = AssetTag.generalize fillImage
                               RenderDescriptor =
                                   SpriteDescriptor
                                       { Transform = fillBarSpriteTransform
                                         Offset = Vector2.Zero
                                         InsetOpt = None
  -                                      Image = entity.GetFillImage world
  +                                      Image = fillImage
                                         Color = fillBarColor
                                         Glow = Color.Zero
                                         Flip = FlipNone }}|])
  
positive.code:         override this.Actualize (entity, world) =
              if entity.GetVisible world && entity.GetInView world then
                  let transform = entity.GetTransform world
                  World.enqueueRenderMessage
                      (LayeredDescriptorMessage
                          { Elevation = transform.Elevation
                            PositionY = transform.Position.Y
                            AssetTag = entity.GetAnimationSheet world |> AssetTag.generalize
                            RenderDescriptor =
                              SpriteDescriptor
                                  { Transform = transform
                                    Offset = Vector2.Zero
                                    InsetOpt = getSpriteInsetOpt entity world
                                    Image = entity.GetAnimationSheet world
                                    Color = entity.GetColor world
                                    Glow = entity.GetGlow world
                                    Flip = entity.GetFlip world }})
  
negative.code:                       Rotation = 0.0f
                        Elevation = entity.GetElevation world + 0.5f
                        Flags = entity.GetFlags world }
                  let font = entity.GetFont world
                  World.enqueueRenderMessage
                      (LayeredDescriptorMessage
                          { Elevation = transform.Elevation
                            PositionY = transform.Position.Y
                            AssetTag = AssetTag.generalize font
                            RenderDescriptor =
                              TextDescriptor
                                  { Transform = transform
                                    Text = text
                                    Font = font
                                    Color = if entity.GetEnabled world then entity.GetTextColor world else entity.GetTextDisabledColor world
                                    Justification = entity.GetJustification world }})
                      world
  