I created a new scene for the rain material that I created previously. I also managed to improve the material this time.
I hope you like the results.
Unreal Engine Rain Material - https://gum.co/imPh
Substance Designer Material (Static) - https://gum.co/ZJrys
I took the chair and table from Modo content. Rest is modeled in Solidworks.
Rain Material - Closeup - Unreal Engine
Rain Material - Cafeteria Scene
Rain Material on Unreal Engine Interface 2
Rain Material on Unreal Engine Interface
Procedural Water Drop Material Tweaks