Why My Rain Broke in Unreal Engine Niagara

Something was working perfectly. Then I changed one small value. And everything broke. This post is part of my daily learning journey in game development. I’m sharing what I learn each day — the basics, the confusion, and the real progress — from the perspective of a beginner. On Day 63 of my game development journey, I worked on fixing a Niagara rain system in Unreal Engine . What I Tried I had a working rain setup. The density looked natural. The fall speed felt right. Then I tweaked one setting to “improve” it. Suddenly: Some drops froze mid-air Some disappeared too quickly The rain stopped feeling realistic It felt completely broken. What Confused Me Why did one small tweak destroy everything? Why were particles floating? Why did it look fine before? Did Niagara bug out? It didn’t make sense. What Finally Clicked Niagara works in stages: Spawn → Initialize Particle → Particle Update → Forces Each module affects the final result. For example: If Lifetime is too short, gravity doesn’