This is a paid asset, but now you can download Storytelling Splash Effect Free.
Detail this asset from Unity Store: Original Link
Storytelling Splash Effect v1.14 (Latest version)
Storytelling Splash Effect is advanced tool for effective presenting content and adding image’s transitions. Typical transition effects usually are not so attractive for players and they limit animator ideas but with SSE you can do more.
Create stunning previews of your art and content. Just add component to the Image, set properties and let the magic happen!
-creating transition effects based on dissolve textures
-control for animator over fade-in/out and loop curves to make more stylish appear effects
-multiple sources of appearing image parts from single object
-control over position, size, rotation of every transition
-support for Mask component
-additional noises and smoothings to make effect fit your game style
-13 example effect patterns
-6 example noise patterns
-concept art preview
-presenting new content
-film-like appear effects
-Unity GUI and Image component>
-Standard Rendering Pipeline
Works on 2018.x, 2019.x, 2020.x
Forum thread: here