Spine Ed covers creating rain and ripple effects with Spine 2D Animation.
Spine 2D Animation is synonymous with character work due to its intuitive and vast animation tools. Check out this tutorial that shows how you can use Spine for all kinds of effects. The Spine Ed channel features Animator Arman Harutyunyan. He shows us how to create rain and ripples and splashes using Spine and a few tricks.
Spine Ed has a series dedicated to creating VFX elements with their software. Esoteric Spine is a fantastic tool for animators. The number of animation tools and the workflow makes it miles ahead of larger packages like Ae, for example.