Projector.ignoreLayers

Description

Which object layers are ignored by the projector.

See layer mask.

By default this is zero - i.e. no layers are ignored. Each set bit in ignoreLayers will make this layer not affected by the projector.

using UnityEngine;

public class Example : MonoBehaviour
{
    void Start()
    {
        Projector proj = GetComponent<Projector>();
        // Make the projector ignore Default (0) layer
        proj.ignoreLayers = (1 << 0);
    }
}

Additional resources: projector component, Layers.