This is a paid asset, but now you can download PRO Outline for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
PRO Outline v1.0
Post-processed PRO Outline asset is great for your game if you want draw outline different objects.
Post processing stack v2 and Unity 2018 or higher required.
Features:
– Works with 2 Render Pipelines without additional setup (Built-in, LWRP)
– Easy to use
– Depth Testing
– Blur
– Works in scene view
Options:
– Per-Object Color
– Fill Object Shape
– Depth Culling
– Invert Depth Culling (draw visible part or not visible part)
– Depth Overlap
– Blur Scale, Iterations and Downsample (more soft outline)
* Not tested on mobile and VR platforms.
** No layered outline feature
*** Now doesn’t works with PPv3 in HDRP 5.3.1 and greater