diff --git a/src/kiri/stacks.js b/src/kiri/stacks.js
index 11756360..9bebee90 100644
--- a/src/kiri/stacks.js
+++ b/src/kiri/stacks.js
@@ -10,10 +10,10 @@
         emissive = 0x101010,
         metalness = 0,
         roughness = 0.3,
-        newMat = createPhongMaterial,
-        freeMem = true;
+        newMat = createPhongMaterial;
 
     let stacks = {},
+        freeMem = true,
         tallest = 0,
         min = 0,
         max = 0,
@@ -26,6 +26,11 @@
         UI = API.ui;
     }
 
+    function setFreeMem(bool) {
+        freeMem = bool;
+        return this;
+    }
+
     function clear() {
         if (!API) {
             init();
@@ -278,7 +283,8 @@
         remove,
         getStack,
         getRange,
-        setRange
+        setRange,
+        setFreeMem
     };
 
 })();
diff --git a/src/mode/cam/client.js b/src/mode/cam/client.js
index e05904b7..b0ed1a09 100644
--- a/src/mode/cam/client.js
+++ b/src/mode/cam/client.js
@@ -398,7 +398,7 @@
         const {x, y, z} = stock;
         if (x && y && z && !STACKS.getStack('bounds')) {
             const render = new KIRI.Render().setLayer('bounds', { face: 0xaaaaaa, line: 0xaaaaaa });
-            const stack = STACKS.create('bounds', SPACE.platform.world);
+            const stack = STACKS.setFreeMem(false).create('bounds', SPACE.platform.world);
             stack.add(render.addPolys([
                 newPolygon().centerRectangle({x:csox, y:csoy, z:0}, x, y),
                 newPolygon().centerRectangle({x:csox, y:csoy, z}, x, y)
@@ -411,6 +411,7 @@
                 newPoint(csox - hx, csoy - hy, 0), newPoint(csox - hx, csoy - hy, sz),
                 newPoint(csox - hx, csoy + hy, 0), newPoint(csox - hx, csoy + hy, sz),
             ], { thin: true }));
+            STACKS.setFreeMem(true);
         }
 
         API.platform.update_top_z(delta);