diff --git a/Assets/MagnetismHeroes/Tests/EditMode/VisualUpgradeAssetTests.cs b/Assets/MagnetismHeroes/Tests/EditMode/VisualUpgradeAssetTests.cs
index 6801c10..ce83173 100644
--- a/Assets/MagnetismHeroes/Tests/EditMode/VisualUpgradeAssetTests.cs
+++ b/Assets/MagnetismHeroes/Tests/EditMode/VisualUpgradeAssetTests.cs
@@ -76,7 +76,7 @@ namespace MagnetismHeroes.Tests
                     string name = decoration.prefab.name;
                     bool solid = name == "MeadowClearing" || name == "GentleHill" || name.Contains("Tree") || name.Contains("Limestone") || name == "SlateBoulder" || name == "OpenStoneArch" || name == "MossStoneSteps";
                     var colliders = decoration.prefab.GetComponentsInChildren<Collider>(true);
-                    if (solid) Assert.That(colliders, Is.Not.Empty, name + " needs a shape-matched collider.");
+                    if (solid) Assert.That(colliders, Is.Not.Empty, name + " needs a shape-matched collider; runtime disables inaccessible instances, while authoring uses terrain for surface probes.");
                     else Assert.That(colliders, Is.Empty, name + " is small vegetation or unreachable scenery.");
                     foreach (var collider in colliders)
                     {
diff --git a/Assets/MagnetismHeroes/Tests/PlayMode/PlaygroundSceneryPlayTests.cs b/Assets/MagnetismHeroes/Tests/PlayMode/PlaygroundSceneryPlayTests.cs
index bc87f43..d50f60b 100644
--- a/Assets/MagnetismHeroes/Tests/PlayMode/PlaygroundSceneryPlayTests.cs
+++ b/Assets/MagnetismHeroes/Tests/PlayMode/PlaygroundSceneryPlayTests.cs
@@ -1,6 +1,7 @@
 #if UNITY_EDITOR
 using System;
 using System.Collections;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using MagnetismHeroes.Core;
@@ -112,6 +113,58 @@ namespace MagnetismHeroes.Tests
             Capture("world1-ten-single-groups-phone-default", "Validated synthetic Core FreePlay fixture of ten single groups; underlying stage 1 UI remains puzzle. Used for like-for-like Editor resource observation only.");
             Assert.That(_app.Presenter.Balls.Count, Is.EqualTo(10));
         }
+        [UnityTest] public IEnumerator AllThirtyRuntimeEnvironmentsOnlyBlockWithReachableScenery()
+        {
+            var errors = new List<string>(); int distant = 0, reachable = 0, selected = 0;
+            for (int id = 1; id <= 30; id++)
+            {
+                _app.StartStage(id); _app.Voice.Clear(); yield return null; yield return null; Physics.SyncTransforms();
+                var playground = _app.Environment.PlaygroundBounds;
+                foreach (var collider in _app.Environment.GetComponentsInChildren<MeshCollider>())
+                {
+                    var surface = collider.GetComponent<MeshRenderer>().bounds;
+                    bool outside = collider.name != "MeadowClearing" && !playground.Intersects(surface);
+                    if (outside)
+                    {
+                        distant++;
+                        if (collider.enabled) errors.Add($"Stage {id} unreachable {collider.name} still blocks at {surface}.");
+                    }
+                    else
+                    {
+                        reachable++;
+                        Assert.That(collider.enabled && !collider.isTrigger, Is.True, $"Stage {id} reachable {collider.name} must block.");
+                    }
+                    bool hit = false;
+                    foreach (var direction in new[] { Vector3.up, Vector3.down, Vector3.left, Vector3.right, Vector3.forward, Vector3.back })
+                    {
+                        float distance = surface.extents.magnitude + 1;
+                        hit |= Physics.RaycastAll(surface.center + direction * distance, -direction, distance * 2)
+                            .Any(item => item.collider == collider);
+                    }
+                    if (outside && hit) errors.Add($"Stage {id} background {collider.name} still receives a Physics ray.");
+                    if (!outside) Assert.That(hit, Is.True, $"Stage {id} reachable {collider.name} no longer blocks a Physics ray.");
+                }
+                Assert.That(Physics.Raycast(new Vector3(0, .1f, 0), Vector3.down, out var ground, 2), Is.True);
+                Assert.That(ground.collider.GetComponentInParent<BoardEnvironment>(), Is.SameAs(_app.Environment), "Visible play ground must still block.");
+                Debug.Log($"Stage {id} ground ray y={ground.point.y:R}, aerial bounds min y={playground.min.y:R}, difference={ground.point.y - playground.min.y:R}");
+                foreach (var ball in _app.Presenter.Balls.Values)
+                {
+                    bool found = false;
+                    foreach (float pitch in new[] { 20f, 45f, 70f })
+                        for (int yaw = 0; yaw < 360 && !found; yaw += 30)
+                        {
+                            View(yaw, pitch, 12); var point = _app.Presenter.Camera.WorldToViewportPoint(ball.transform.position);
+                            if (point.z <= 0 || point.x < .05f || point.x > .95f || point.y < .05f || point.y > .95f) continue;
+                            var ray = _app.Presenter.Camera.ViewportPointToRay(point);
+                            found = Physics.Raycast(ray, out var first, 100) && first.collider == ball.GetComponent<SphereCollider>();
+                        }
+                    Assert.That(found, Is.True, $"Stage {id} sphere {ball.BallId} no longer selectable by first hit."); selected++;
+                }
+            }
+            Debug.Log($"Runtime scenery roles: 30 stages, {distant} distant colliders, {reachable} reachable colliders, {selected} selectable spheres.");
+            Assert.That(distant, Is.GreaterThan(0)); Assert.That(reachable, Is.GreaterThan(0));
+            Assert.That(errors, Is.Empty, string.Join("\n", errors));
+        }
     }
 }
 #endif
diff --git a/Assets/MagnetismHeroes/UnityRuntime/Presentation/BoardEnvironment.cs b/Assets/MagnetismHeroes/UnityRuntime/Presentation/BoardEnvironment.cs
index e3f0b75..04cb78b 100644
--- a/Assets/MagnetismHeroes/UnityRuntime/Presentation/BoardEnvironment.cs
+++ b/Assets/MagnetismHeroes/UnityRuntime/Presentation/BoardEnvironment.cs
@@ -29,6 +29,14 @@ namespace MagnetismHeroes.UnityRuntime.Presentation
                     (corner & 2) == 0 ? bounds.min.y : bounds.max.y,
                     (corner & 4) == 0 ? bounds.min.z : bounds.max.z)));
             PlaygroundBounds = worldBounds;
+            Physics.SyncTransforms();
+            foreach (Transform prop in transform)
+            {
+                // The clearing supports the aerial volume from just below its lower boundary.
+                if (!prop.gameObject.activeSelf || prop.name == "MeadowClearing(Clone)") continue;
+                foreach (var collider in prop.GetComponentsInChildren<Collider>())
+                    if (!PlaygroundBounds.Intersects(collider.bounds)) collider.enabled = false;
+            }
         }
     }
 }