Culling

using UnityEngine;

public class CullingSetup : MonoBehaviour
{
  void Start()
  {
      Camera cam = Camera.main;

      // Per-layer cull distance
      // 32 entries (32 layers) — 0 = use Far Clip
      float[] distances = new float[32];
      distances[8]  = 50f;   // Layer 8 "SmallProps": cull after 50m
      distances[9]  = 150f;  // Layer 9 "MediumProps": cull after 150m
      distances[10] = 0f;    // Layer 10: use Camera.farClipPlane
      cam.layerCullDistances = distances;

      // Spherical culling: from camera center, not frustum planes
      cam.layerCullSpherical = true;
  }

  // Is this renderer currently visible to a camera?
  void CheckVisibility(Renderer rend)
  {
      if (rend.isVisible)
          Debug.Log(rend.name + " is being rendered");
  }
}

using UnityEngine;

public class DynamicLOD : MonoBehaviour
{
  public Renderer[] lod0, lod1, lod2;
  LODGroup group;

  void Awake()
  {
      group = GetComponent<LODGroup>();
      if (group == null)
          group = gameObject.AddComponent<LODGroup>();

      // Configure LOD levels from code
      LOD[] lods = new LOD[3];
      lods[0] = new LOD(0.5f, lod0);  // 50%+ screen → LOD0
      lods[1] = new LOD(0.15f, lod1); // 15-50% → LOD1
      lods[2] = new LOD(0.03f, lod2); // <3% → LOD2, <0 → culled
      group.SetLODs(lods);
      group.RecalculateBounds();
  }

  // Force a specific LOD (debug or cutscene close-up)
  public void ForceLOD(int level)
  {
      group.ForceLOD(level); // -1 = disable force, use automatic
  }
}