diff --git a/src/java/com/threerings/miso/client/DirtyItemList.java b/src/java/com/threerings/miso/client/DirtyItemList.java
index abc8bb6dd..26dfc3529 100644
--- a/src/java/com/threerings/miso/client/DirtyItemList.java
+++ b/src/java/com/threerings/miso/client/DirtyItemList.java
@@ -1,8 +1,9 @@
 //
-// $Id: DirtyItemList.java,v 1.9 2002/01/31 01:04:54 mdb Exp $
+// $Id: DirtyItemList.java,v 1.10 2002/02/06 23:14:56 mdb Exp $
 
 package com.threerings.miso.scene;
 
+import java.awt.Color;
 import java.awt.Graphics2D;
 import java.awt.Rectangle;
 import java.awt.Shape;
@@ -32,7 +33,7 @@ public class DirtyItemList
     public void appendDirtySprite (
         MisoCharacterSprite sprite, int x, int y, Rectangle dirtyRect)
     {
-        _items.add(new DirtyItem(sprite, null, x, y, dirtyRect));
+        _items.add(new DirtyItem(sprite, null, null, x, y, dirtyRect));
     }
 
     /**
@@ -40,9 +41,10 @@ public class DirtyItemList
      * dirty item list.
      */
     public void appendDirtyObject (
-        ObjectTile tile, Shape bounds, int x, int y, Rectangle dirtyRect)
+        ObjectTile tile, Shape bounds, Shape footprint,
+        int x, int y, Rectangle dirtyRect)
     {
-        _items.add(new DirtyItem(tile, bounds, x, y, dirtyRect));
+        _items.add(new DirtyItem(tile, bounds, footprint, x, y, dirtyRect));
     }
 
     /**
@@ -160,6 +162,10 @@ public class DirtyItemList
         /** The bounds of the dirty item if it's an object tile. */
         public Shape bounds;
 
+        /** The footprint of the dirty item if it's an object tile and
+         * we're drawing footprints. */
+        public Shape footprint;
+
         /** The origin tile coordinates. */
         public int ox, oy;
 
@@ -175,11 +181,12 @@ public class DirtyItemList
         /**
          * Constructs a dirty item.
          */
-        public DirtyItem (
-            Object obj, Shape bounds, int x, int y, Rectangle dirtyRect)
+        public DirtyItem (Object obj, Shape bounds, Shape footprint,
+                          int x, int y, Rectangle dirtyRect)
         {
             this.obj = obj;
             this.bounds = bounds;
+            this.footprint = footprint;
             this.ox = x;
             this.oy = y;
             this.dirtyRect = dirtyRect;
@@ -208,6 +215,12 @@ public class DirtyItemList
             // clip the draw region to the dirty portion of the item
             gfx.clip(clip);
 
+            // if there's a footprint, paint that
+            if (footprint != null) {
+                gfx.setColor(Color.black);
+                gfx.draw(footprint);
+            }
+
             // paint the item
             if (obj instanceof Sprite) {
                 ((Sprite)obj).paint(gfx);
diff --git a/src/java/com/threerings/miso/client/IsoSceneView.java b/src/java/com/threerings/miso/client/IsoSceneView.java
index b7d5e8530..367776c3b 100644
--- a/src/java/com/threerings/miso/client/IsoSceneView.java
+++ b/src/java/com/threerings/miso/client/IsoSceneView.java
@@ -1,5 +1,5 @@
 //
-// $Id: IsoSceneView.java,v 1.90 2002/02/06 17:13:06 mdb Exp $
+// $Id: IsoSceneView.java,v 1.91 2002/02/06 23:14:56 mdb Exp $
 
 package com.threerings.miso.scene;
 
@@ -648,16 +648,24 @@ public class IsoSceneView implements SceneView
                 // get the object's coordinates and bounding polygon
                 int coord = ((Integer)iter.next()).intValue();
                 Polygon poly = (Polygon)_objpolys.get(coord);
-
-                if (poly.intersects(r)) {
-                    // get the dirty portion of the object
-                    Rectangle drect = poly.getBounds().intersection(r);
-                    int tx = coord >> 16, ty = coord & 0x0000FFFF;
-                    _dirtyItems.appendDirtyObject(
-                        tiles.getTile(tx, ty), poly, tx, ty, drect);
-                    // Log.info("Dirtied item: Object(" + tx + ", " +
-                    // ty + ")");
+                if (!poly.intersects(r)) {
+                    continue;
                 }
+
+                // get the dirty portion of the object
+                Rectangle drect = poly.getBounds().intersection(r);
+                int tx = coord >> 16, ty = coord & 0x0000FFFF;
+                ObjectTile tile = tiles.getTile(tx, ty);
+
+                // compute the footprint if we're rendering those
+                Polygon foot = null;
+                if (_renderObjectFootprints) {
+                    foot = IsoUtil.getObjectFootprint(
+                        _model, _polys[tx][ty], tile);
+                }
+
+                _dirtyItems.appendDirtyObject(tile, poly, foot, tx, ty, drect);
+                // Log.info("Dirtied item: Object(" + tx + ", " + ty + ")");
             }
         }
     }
@@ -791,7 +799,7 @@ public class IsoSceneView implements SceneView
             }
 
             // we've passed the test, add the object to the list
-            list.appendDirtyObject(tile, poly, tx, ty, pbounds);
+            list.appendDirtyObject(tile, poly, null, tx, ty, pbounds);
         }
     }
 
@@ -901,6 +909,9 @@ public class IsoSceneView implements SceneView
     /** The object that the mouse is currently hovering over. */
     protected Object _hobject;
 
+    /** If true, object footprints are rendered when rendering objects. */
+    protected boolean _renderObjectFootprints;
+
     /** The stroke object used to draw highlighted tiles and coordinates. */
     protected BasicStroke _hstroke = new BasicStroke(2);
 }