def vertex_color_dirt(blur_strength: float=1.0, blur_iterations: int=1,
    clean_angle: float=3.14159, dirt_angle: float=0.0, dirt_only: bool=False):
    """Undocumented contribute <https://developer.blender.org/T51061> 

    :param blur_strength: Blur Strength, Blur strength per iteration 
    :type blur_strength: float
    :param blur_iterations: Blur Iterations, Number of times to blur the colors (higher blurs more) 
    :type blur_iterations: int
    :param clean_angle: Highlight Angle, Less than 90 limits the angle used in the tonal range 
    :type clean_angle: float
    :param dirt_angle: Dirt Angle, Less than 90 limits the angle used in the tonal range 
    :type dirt_angle: float
    :param dirt_only: Dirt Only, Don’t calculate cleans for convex areas 
    :type dirt_only: bool
    """
    pass
