Fiz uma modificação meio inútil aqui e resolvi postar pois ela pode ser modificada para aceitar outras imagens e tal.
Screen:

Spoiler:

Code:

Código:

#==============================================================================
# ** Button - This class is used to create buttons.
#------------------------------------------------------------------------------
# Author    Trebor777
# Modified  Valentine
# Version  2.0
#==============================================================================
class Button < Widget
  attr_accessor :mask
  #--------------------------------------------------------------------------
  # * Object Initialization
  #--------------------------------------------------------------------------
  def initialize(win,x,y,text,id=0,widgetid=0,chatid=0,&block)
    super(win,x,y)
    @text = text
    @block = block
    @chatid = chatid
    @id = id
    @widgetid = widgetid
    refresh
  end
  #--------------------------------------------------------------------------
  # Draw the button text, and create the mask.
  #--------------------------------------------------------------------------
  def refresh
    b = Bitmap.new(4,4)
    if not @id == 2
      b.font.size = 16
      if @id == 3
        cx = 54
      else
        cx = b.text_size(@text).width
      end
    else
      cx = 104
    end
    b.dispose
    s.bitmap = Bitmap.new(cx+10, 20)
    s.bitmap.font.color = Color.new(0,0,0,255)
    s.bitmap.font.size = 16 if not @id == 2
    @mask = Sprite.new(win.viewport)
    @mask.x=s.x
    @mask.y=s.y
    if @chatid == $chat_id
      @mask.visible=true
    else
      @mask.visible=false
    end
    @mask.z = 5000
    @mask.bitmap=Bitmap.new(s.bitmap.width,s.bitmap.height)
    #@mask.bitmap.fill_rect(0, 0, @s.bitmap.width, @s.bitmap.height, Window_Edits::Button_ColorSkin_Start)
    mask = RPG::Cache.picture('mask4')
    rect3 = Rect.new(0, 0, s.bitmap.width - 4, mask.height)
    @mask.bitmap.blt(0, 0, mask, rect3)
    rect4 = Rect.new(mask.width - 4, 0, 4, mask.height)
    @mask.bitmap.blt(s.bitmap.width - 4, 0, mask, rect4)
    @mask.bitmap.draw_text(0, 0, @s.bitmap.width, s.bitmap.height, @text, 1)
    @mask.opacity = 120
    s.bitmap.clear
    back = RPG::Cache.picture('button4')
    rect = Rect.new(0, 0, s.bitmap.width - 4, back.height)
    s.bitmap.blt(0, 0, back, rect)
    rect2 = Rect.new(back.width - 4, 0, 4, back.height)
    s.bitmap.blt(s.bitmap.width - 4, 0, back, rect2)
    s.bitmap.font.color = Color.new(0, 0, 0)
    #s.bitmap.font.color = Color.new(168, 168,  168)
    s.bitmap.font.size = 13
    s.bitmap.draw_text(0, 0, @s.bitmap.width, s.bitmap.height, @text, 1)
  end
  #--------------------------------------------------------------------------
  # Dispose the mask, and itself
  #--------------------------------------------------------------------------
  def dispose
    @mask.dispose
    super
  end
  #--------------------------------------------------------------------------
  # Frame update, check the mask status, and active status
  #--------------------------------------------------------------------------
  def update
    @mask.visible= false if @mask.visible and !visible
    if visible
      @mask.x=s.x if @mask.x != s.x
      @mask.y=s.y if @mask.y != s.y
      @mask.update
      if in_area? or @chatid == $chat_id
        @mask.visible=true
      else
        @mask.visible=false
      end
      self.active=false if self.active
      s.opacity = Window_Edits::Button_Active_Opacity  if s.opacity<Window_Edits::Button_Active_Opacity
    end
    if win!=nil
      x= s.x
      y= s.y
      s.visible = win.visible
    end
    if (Input.pressed(Input::Mouse_Left) and in_area? and s.visible and @widgetid == 1) or (Input.trigger(Input::Mouse_Left) and in_area? and s.visible and @widgetid != 1)
      @active=true
      win.active = true
      clicked
      return
    elsif Input.trigger(Input::Mouse_Left) and !in_area? and s.visible
      @active=false
      outclick
      return
    end
    #super
  end
  #--------------------------------------------------------------------------
  # Change the button opacity when clicked
  #--------------------------------------------------------------------------
  def clicked
    #$game_system.se_play($data_system.decision_se)
    s.opacity -= Window_Edits::Button_Not_Active_Opacity if s.opacity==Window_Edits::Button_Active_Opacity
    if @block != nil
      @block.call
    else
    self.active = true
    end
  end
  #--------------------------------------------------------------------------
  # Visible
  #--------------------------------------------------------------------------
  def visible=(v)
    @mask.visible=v if @mask != nil
    s.visible = v if s != nil
  end
end


Imagens necessárias:
https://imgur.com/QCF4w1V,qcbNeoX

Interessante obrigado por compartilhar +1 Credit.