Using a Shadow Projector in Unity 3D
A shadow projector is the perfect alternative to real-time shadows in Unity 3d. Real-time shadows feature is only available in Unity Pro. For those using free-version of Unity 3d, Game Ready 3d car models include shadow projector that can simulate shadows. Even if you have real-time shadows available, you can increase game/render performance by using a shadow projector.

Most 3d car models purchased from Game Ready 3d include everything you need to utilize the shadow projector. Follow these simple steps to add the included shadow projector prefab into the scene.
1. Be certain you have the 3d asset mesh in the scene
2. Be certain you have a plane or ground object to receive the shadow in the
    scene.
3. Plane/ground/road object must be in a layer other than the Default layer
    The plane/ground/road should be the only object(s) receiving the shadow.
    All other objects must be in a layer ignored by the shadow projector
    (change/create/rename layers in the inspector)
4. Find and open a folder called Shadow Projector within the asset folder
5. Drag and drop Shadow Projector prefab into the scene.
6. Parent/attach Shadow Projector prefab to shadow casting object
7. Set both X and Z position to Zero
(Position Y = 8 and rotation X = 90)
8. Shadow is now projected on the plane/ground/road object.




Special Notes
The shadow projector prefab ignores the default layer.  All components of the 3d asset mesh are on the default layer, and therefore, will not receive shadow. If components of the mesh are moved to different layers, be certain that you add those layers to the ignore layers list.

If you don't see shadow on the plane/ground/road object, be certain that they are not in a layer ignored by the shadow projector prefab.
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