This is a paid asset, but now you can download Lens Effects – Dirt and Bloom Free.
Detail this asset from Unity Store: Original Link
Lens Effects – Dirt and Bloom v1.0 (Latest version)
“If possible, please buy the package to support the developer”
Lens Effects – Dirt and Bloom is a simple but effective Post Process Image Effect pack for Unity that stimulates onscreen Dirt, Bloom and Chromatic Aberration effects in your game, with a customizable editor.
– Single or combined Lens Effects using Dirt, Bloom and Chromatic Aberration.
– Includes Diffraction Effect to stimulate sun light glare on lens.
– Creates 128 + 15 unique Lens Effects.
– Multi Lens type option – Blur or Chromatic
– 16 + 15 Dirt Lens Textures and 8 Diffraction Lens textures.
– Scalable options to control various parameters like type of Lens effect, Lens and Diffraction textures, Intensity levels, Tint, Threshold, DownSample rate among others. .
Works with all Unity versions!