This asset allows you to create portals that players can see and walk through as if space itself has been warped. Players can see and step seamlessly across space through portals.这个资源允许你创建入口，玩家可以看到和走过，就像空间本身已经扭曲一样。玩家可以通过入口无缝地看到和跨过空间
Features:
- Game-ready VFX (open, idle and close states)
- Seamless camera transition
- Rigidbodies save their velocities
- Optimization (frustum culling)
In Unity 2017.4.13f1 found bug with CullingGroup API, frustum culling of portals is not recommended to use in that Unity version.
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