Hi all, i was wondering if some one could help me. Basically the question is i have a object and it has a layer on it called wall. Now what i want is you see how the camera has a Culling Mask and it allows to to pick what layers the camera will avoid how can i do this to an normal object so it can avoid objects that have layers on them please help me thank you very much in advance :) MCHALO
You simply select the layer that particular object is in. For a GameObject, look in the inspector, second line from the top. By default, it'll be in the "Default"-layer. Expand that dropdown and select another layer, then remove that other layer from the Camera's culling mask. That camera now no longer renders that object.
Edit:
For the usage of Layers in collision detection, you can refer to this article, from Unity's documentation:
http://unity3d.com/support/documentation/Components/Layer%20Based%20Collision%20detection.html