Sometimes a game forces you into strange situations. One of the situations I can remember in a game is when we needed to change the particle system color to match a certain color the player had collected. In such a case, it was not possible to define a color previously, and the particle system needed to be flexible enough to match the color the player already had, keeping in mind that every time the scenario is different and the player holds a different color.
Such a situation normally is not easy, but thankfully, with Unreal Engine, you can define the parameters that you might need to change at runtime. Then, changing its value is a matter of setting a new value to the tagged parameter. But how?
First you need to decide which value is going to be changed, and let's say I need to change the main color of the particle system. So, you simply go to the targeted module and to the desired value, and set its Distribution value to Distribution Vector Particle Parameter...