Silly example, but in geometry dash there is a grouping system that allows multiple objects to be effected by the same trigger, no matter the type. Is there any way to do this with unreal objects? For example scaling?
The real problem is that I need to select which mesh/material needs to be changed, but while selecting multiple objects they may differ.
Rather than using one grouping to select multiple objects, you can send an event that affects multiple blueprints. Check out this non-Epic affiliate explanation of how it works: