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AutoLOD - Impostors is an easy tool that provides full impostor management, from baking to rendering, with automatic LOD Group setup. Here you can get the latest updates of this package absolutely free! Just click the links below.
What is an impostor?
An impostor is a billboard that displays an image of a 3D object. The image will update and change according to the viewing angle in order to fake a 3D effect and save on performance.
When should I use it?
Impostors are mainly used to render static objects far off in the distance in order to optimize the scene.
You could also use them to get a unique art style with a 3D "snapping" effect.
Can any object in my scene be replaced with an impostor?
Technically, any object with a mesh renderer attached can be replaced with an impostor. However, they should mainly be used to replace static meshes in the far distance. At closer range, the difference will be noticeable as a simple quad doesn't intersect the same way with surrounding objects in the same way as the original mesh. Also, impostors are baked in orthographic view which means that the perspective will be wrong at closer ranges.
Are impostors compatible with the LODGroup component?
Yes. You also don't have to mess with geometry alignment, the tool has an option to set the LODs for you.
How long does it take to bake an impostor?
Depending on your hardware and the baking settings, it may take up to 30 seconds.
Can I build on any platform?
The impostors shader is based on Unity high-level surface shader so you should be able to build on any platform.