I am trying to make a particle effect for a ball (sized 5x5x5 studs). I have tested in studio, and the fire particle looks too big for the ball if its in the ball itself. Although if I place a smaller 4x4x4 ball inside the real ball and put the particle effect in there, it looks much better.
Is there any way I can make the particle have the effects of the smaller ball only using the 5x5x5 part?
Setting an area that a ParticleEmitter emits from is unheard of to my knowledge. Your method (placing a smaller object representing the emission area inside another object) is probably what most people would do as a simple workaround. My knowledge is very limited, and I can only affirm that your attempt is a decent solution. You can minimize the presence of the smaller ball by making it completely transparent and uncollidable.