I've been wondering about the way targetting by particles works. Turns out that:
1. % that target = what part of the particles from that emitter will target sources, as default, but
2. if you set "Ships|Emitters%" to specific values, it divides the targetting particles into 2 additional groups, the new ones targetting respectively ships and emitters.
So. As an example:
- if I have % that target at 50
- and I have ships at 50%, emitters at 25%
then I have 4 groups of particles from that emitter:
1. 50% don't target;
2. 25% target ships (50% of 50%);
3. 12,5% target emitters (25% of 50%);
4. 12,5% target sources ( (100%-50% of ships-25% of emitters) of 50% ).