Aren't Particle Emission Angle Var and Arc Base Redundant?

#1 I take back that last bit. I'm having trouble seeing the value in Emission Arc Var as well. Seems to me that Emission Arc and Emission Arc Var are both extraneous.

#2 The emission arc is the angle range that the particle effect will spew. A 360 degree arc will spew all directions, while a 90 degree one will only spew a 90 degree selection.

Emission Angle is the actual angle that arc will spew at, not the range. So you can make it go up, down, left, or right at various different arcs.

The variances varies their value so to make different particle effects not look exactly the same.

#3 I understand what they do, but it seemed that the following would produce identical results.

Case #1:

Angle Var: 180
Arc: 0
Arc Var: 0

Case #2:

Angle Var: 120
Arc: 60
Arc Var: 0

Case #3:

Angle Var: 60
Arc: 120
Arc Var: 0

Case #4:

Angle Var: 60
Arc: 60
Arc Var: 60

I understand now that they don't, because while the emission angle in each case will vary from -90 to +90 degrees from base, the distribution of particles will be increasingly concentrated in the center of the range as you move from case #1 to case #4.

#4 Also so you guys know. Last I checked a bug makes every additional emitter in a particle system past the first is not effected by emission angle.