   plotting points with alpha
  Hi there,Is it possible to plot a point and give an alpha value using GL_POINTS and glVertex4f?I have tried to change my mode into RGBA, and used glVertex4f, but the last parameter is only increasing the size of the object.   
  The fourth parameter of glVertex4f is used for scaling.Use the fource parameter of glColor4f to set the alpha value.   ;  Ok thanks! i made a silly mistake. It is now working after enabling GL_BLEND   