This is a paid asset, but now you can download AutoLOD – Impostors 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
AutoLOD – Impostors v0.1.0 (Latest version)
AutoLOD – Impostors is a simple tool that provide full impostors management, from baking to rendering.
What is an impostor?
An impostor is a billboard whose material displays a picture of a 3D object. Depending of the view angle, a different picture of the object will be displayed, to fake a 3D effect.
When should I use it?
Impostors are mainly used to optimize an existing scene, to render static objects far in the distance.
You can also use them to get a unique art style with a 3D “snapping” effect.
Can any object in my scene be replaced by an impostor?
Technically, any object with a mesh renderer attached. But you should only replace static meshes far in the distance. At closer range, you will notice the difference as a simple quad doesn’t intersect the same way than the original mesh with surrounding objects. Also, impostors are baked in orthographic view, meaning the perspective will be wrong at close range.
Are impostors compatible with the LODGroup component?
Yes. And you don’t have to mess with geometry alignment, the tool has an option to set the LODs for you.
How long does it takes to bake an impostor?
Depending on your hardware and the baking settings, it may take up to 30 seconds.
Is any dependency needed?
No. It is a standalone package.
Asset demo scene uses Ultimate Stylized Nature Pack under CC0 License; see Third-Party Notices.txt file in package for details.
You can use your own baking scene for specific lighting settings
You can choose the atlas size from 128×128 to 4096×4096
You can know the size of the generated impostor before baking it
Supports DXT1/DXT5 compression to limit the memory usage of the generated textures
You can bake objects following an UV sphere vertices coordinates or a Pseudo-Fibonacci sphere (uniform areas) according to your needs
You can preview the camera positions for baking as well as the atlas coverage directly in the editor window.
You can optionnally setup an automatic LODGroup after baking the impostor