diff --git a/MUNGA_L4/L4VIDRND.cpp b/MUNGA_L4/L4VIDRND.cpp
index 7cd0ce0..89e63ff 100644
--- a/MUNGA_L4/L4VIDRND.cpp
+++ b/MUNGA_L4/L4VIDRND.cpp
@@ -1131,6 +1131,38 @@ void
 
 			if (traced != EntityID::Null && traced == myEntity->GetEntityID())
 			{
+				//
+				// Scoped out here, not inside the range test below, because
+				// the foreign-eye check has to read them before that test
+				// runs.
+				//
+				static Vector3D last_dir;
+				static Logical have_last = False;
+				static Scalar next_say = 0.0f;
+				static Scalar mean_angle = 0.0f;
+				static Scalar last_event = 0.0f;
+				static Scalar interval_sum = 0.0f;
+				static Scalar interval_min = 1000.0f;
+				static Scalar interval_max = 0.0f;
+				static int interval_count = 0;
+				static int frames = 0;
+				static int lurches = 0;
+				static int stalls = 0;
+				static Scalar last_angle = 0.0f;
+				static Logical have_angle = False;
+				static Scalar fraction_sum = 0.0f;
+				static int pinned_high = 0;
+				static int pinned_low = 0;
+				static Point3D last_pod(0.0f, 0.0f, 0.0f);
+				static Point3D last_eye(0.0f, 0.0f, 0.0f);
+				static Logical have_pod = False;
+				static Scalar last_pod_step = 0.0f;
+				static Scalar last_eye_step = 0.0f;
+				static Scalar eye_travel = 0.0f;
+				static int pod_stalls = 0;
+				static int eye_stalls = 0;
+				static int foreign_eye = 0;
+
 				gLastSampledFrame = gEyeFrame;
 
 				Vector3D to_pod;
@@ -1140,34 +1172,44 @@ void
 
 				Scalar range = to_pod.Length();
 
-				if (range > 0.1f)
+				//
+				// Reject a sample taken through a DIFFERENT eye.
+				//
+				// A camera station draws the map on the gauge wheel as well
+				// as the world, and that render runs the eye renderable too,
+				// so gEyeFrame ticks for it and this trace was comparing the
+				// map's viewpoint against the main one and calling the
+				// difference a stall. The tell was the period: 0.34s with
+				// its minimum and maximum identical to six figures, which is
+				// twenty frames exactly. Nothing in the network or the
+				// simulation keeps time that well - only a render schedule
+				// does. The stall and lurch counts converging to the same
+				// number said the same thing, since a stray viewpoint
+				// produces one short step going out and one long one coming
+				// back.
+				//
+				// A real camera at racing speed moves under a metre between
+				// frames, so twenty is far outside anything legitimate while
+				// still tolerating a genuine cut between trackside cameras.
+				//
+				Scalar eye_jump = 0.0f;
+				if (have_pod)
 				{
-					static Vector3D last_dir;
-					static Logical have_last = False;
-					static Scalar next_say = 0.0f;
-					static Scalar mean_angle = 0.0f;
-					static Scalar last_event = 0.0f;
-					static Scalar interval_sum = 0.0f;
-					static Scalar interval_min = 1000.0f;
-					static Scalar interval_max = 0.0f;
-					static int interval_count = 0;
-					static int frames = 0;
-					static int lurches = 0;
-					static int stalls = 0;
-					static Scalar last_angle = 0.0f;
-					static Logical have_angle = False;
-					static Scalar fraction_sum = 0.0f;
-					static int pinned_high = 0;
-					static int pinned_low = 0;
-					static Point3D last_pod(0.0f, 0.0f, 0.0f);
-					static Point3D last_eye(0.0f, 0.0f, 0.0f);
-					static Logical have_pod = False;
-					static Scalar last_pod_step = 0.0f;
-					static Scalar last_eye_step = 0.0f;
-					static Scalar eye_travel = 0.0f;
-					static int pod_stalls = 0;
-					static int eye_stalls = 0;
+					Scalar dx = gEyeWorld.x - last_eye.x;
+					Scalar dy = gEyeWorld.y - last_eye.y;
+					Scalar dz = gEyeWorld.z - last_eye.z;
+					eye_jump = (Scalar) sqrt((double)(dx*dx + dy*dy + dz*dz));
+				}
 
+				if (eye_jump > 20.0f)
+				{
+					++foreign_eye;
+					have_last = False;			// do not bridge across it
+					have_angle = False;
+					have_pod = False;
+				}
+				else if (range > 0.1f)
+				{
 					Vector3D dir;
 					dir.Divide(to_pod, range);
 					++frames;
@@ -1325,7 +1367,8 @@ void
 
 							DEBUG_STREAM << "CamLog: motion split - pod "
 								<< pod_stalls << " stall(s), eye "
-								<< eye_stalls << " stall(s), eye travelled "
+								<< eye_stalls << " stall(s), " << foreign_eye
+								<< " foreign-eye sample(s) rejected, eye travelled "
 								<< eye_travel << "m, verdict "
 								<< ((pod_stalls > eye_stalls * 2)
 										? "the pod"
@@ -1348,6 +1391,7 @@ void
 						pod_stalls = 0;
 						eye_stalls = 0;
 						eye_travel = 0.0f;
+						foreign_eye = 0;
 					}
 				}
 			}