protected void CreateBrush()
{
if (this.m_brush.IsValid)
{
this.DestroyBrush();
}
this.m_brush = PaintBrush.Create(!this.m_square.Value, this.m_radius.Value, this.m_hardness.Value, this.m_opacity.Value, this.m_distortion.Value * this.m_radius.Value * 0.7f);
}