If you doing this mechanically way, you will not get a good photos of starmines forever. You must not got away a moment of change the scene. Not expose another kind of shells are in one flame except if you need it. If you done it, your starmine photo will be very clear. Ground effect Niagara Falls.
Ground effect give out a lot of smoke.
According to the direction of the wind, It covering oneself. Smoke,It is useful on occasion to express the power of the fireworks. But It will be nuisance in usual. So when taking a Ground effect, we must take it early in the first place regardless of anything. Before the smoke cover your view.