diff --git a/src/AcDream.Core/Physics/PhysicsDataCache.cs b/src/AcDream.Core/Physics/PhysicsDataCache.cs
index 9bcda0b..ae40c63 100644
--- a/src/AcDream.Core/Physics/PhysicsDataCache.cs
+++ b/src/AcDream.Core/Physics/PhysicsDataCache.cs
@@ -215,8 +215,29 @@ public sealed class PhysicsDataCache
 
             var worldOrigin = Vector3.Transform(Vector3.Zero, worldTransform);
 
+            // A6.P3 slice 4 (2026-05-22): also dump portal targets so we
+            // can see which cells the player should be able to transition
+            // to (issue #98 investigation: cellar-up stuck at top of ramp).
+            string portalTargets;
+            if (portals.Count == 0)
+            {
+                portalTargets = "portalTargets=[]";
+            }
+            else
+            {
+                var sb = new System.Text.StringBuilder("portalTargets=[");
+                for (int i = 0; i < portals.Count; i++)
+                {
+                    if (i > 0) sb.Append(',');
+                    sb.Append(System.FormattableString.Invariant(
+                        $"(cell=0x{portals[i].OtherCellId:X4},poly=0x{portals[i].PolygonId:X4},flags=0x{portals[i].Flags:X4})"));
+                }
+                sb.Append(']');
+                portalTargets = sb.ToString();
+            }
+
             Console.WriteLine(System.FormattableString.Invariant(
-                $"[cell-cache] envCellId=0x{envCellId:X8} physicsPolyCount={cellStruct.PhysicsPolygons?.Count ?? 0} resolvedCount={resolved.Count} bspTotalLeafPolys={bspTotalLeafPolys} bspUnmatchedIds={bspUnmatchedIds} {bsStr} portalCount={portals.Count} visibleCells={visibleCellIds.Count} cellBspRoot={(cellStruct.CellBSP?.Root is null ? "null" : "ok")} worldOrigin=({worldOrigin.X:F2},{worldOrigin.Y:F2},{worldOrigin.Z:F2})"));
+                $"[cell-cache] envCellId=0x{envCellId:X8} physicsPolyCount={cellStruct.PhysicsPolygons?.Count ?? 0} resolvedCount={resolved.Count} bspTotalLeafPolys={bspTotalLeafPolys} bspUnmatchedIds={bspUnmatchedIds} {bsStr} portalCount={portals.Count} visibleCells={visibleCellIds.Count} cellBspRoot={(cellStruct.CellBSP?.Root is null ? "null" : "ok")} worldOrigin=({worldOrigin.X:F2},{worldOrigin.Y:F2},{worldOrigin.Z:F2}) {portalTargets}"));
         }
 
         if (PhysicsDiagnostics.ProbeWalkMissEnabled)