Go into Feral Heart's media folders (in both the particles folder and my_objects) and search for any double particles. They will have _0 or _1 etc at the end of them. Delete these.
Everytime you export a map and this occurs, you just need to delete the duplicate particles.
I appreciate the quick reply. One last question, do I delete the zeroes and ones, or the particle itself?
And where exactly should I be looking for the zeroes and ones (in the particle file period or under a certain area, e.g. common_direction, common_up_vector, etc.)?
