diff --git a/compare_test.go b/compare_test.go
index 7c9241f..6dc7802 100644
--- a/compare_test.go
+++ b/compare_test.go
@@ -16,9 +16,7 @@ var (
 )
 
 func ignoreUnpredictable(k string, v interface{}) bool {
-	if _, ok := v.(float64); ok {
-		return true
-	}
+	// Date and EpochTime are regenerated on every build by design.
 	if k == "Date" || k == "EpochTime" {
 		return true
 	}
@@ -26,6 +24,11 @@ func ignoreUnpredictable(k string, v interface{}) bool {
 	return false
 }
 
+// approxFloats compares float64 values with a small absolute tolerance
+// consistent with number smoothing (positions 3dp, scale 2dp, colors 5dp),
+// rather than ignoring them outright.
+var approxFloats = cmpopts.EquateApprox(0, 1e-4)
+
 func compareDelta(t *testing.T, filea, fileb string) error {
 	a, err := file.ReadRawFile(filea)
 	if err != nil {
@@ -60,7 +63,7 @@ func compareDelta(t *testing.T, filea, fileb string) error {
 	delete(a, osKey)
 	delete(b, osKey)
 
-	if diff := cmp.Diff(a, b, cmpopts.IgnoreMapEntries(ignoreUnpredictable)); diff != "" {
+	if diff := cmp.Diff(a, b, cmpopts.IgnoreMapEntries(ignoreUnpredictable), approxFloats); diff != "" {
 		t.Errorf("want != got:\n%v\n", diff)
 	}
 	return nil
@@ -154,7 +157,7 @@ func compareObjs(t *testing.T, guid string, a, b map[string]interface{}) error {
 		return fmt.Errorf("in obj %s, one has sub-objects, the other does not", guid)
 	}
 
-	if diff := cmp.Diff(a, b, cmpopts.IgnoreMapEntries(ignoreUnpredictable)); diff != "" {
+	if diff := cmp.Diff(a, b, cmpopts.IgnoreMapEntries(ignoreUnpredictable), approxFloats); diff != "" {
 		t.Errorf("want != got:\n%v\n", diff)
 	}
 	return nil
diff --git a/tests/e2e_test.go b/tests/e2e_test.go
index d0f0576..15a2325 100644
--- a/tests/e2e_test.go
+++ b/tests/e2e_test.go
@@ -91,9 +91,7 @@ func TestAllReverseThenBuild(t *testing.T) {
 				t.Fatalf("output.json not parsed : %v", err)
 			}
 			ignoreUnpredictable := func(k string, v interface{}) bool {
-				if _, ok := v.(float64); ok {
-					return true
-				}
+				// Date and EpochTime are regenerated on every build by design.
 				if k == "Date" || k == "EpochTime" {
 					return true
 				}
@@ -133,7 +131,11 @@ func TestAllReverseThenBuild(t *testing.T) {
 			normalizeBundledLua(want)
 			normalizeBundledLua(got)
 
-			if diff := cmp.Diff(want, got, cmpopts.IgnoreMapEntries(ignoreUnpredictable)); diff != "" {
+			// Floats are compared approximately rather than skipped. Smoothing rounds
+			// positions to 3dp, scale to 2dp, and colors to 5dp, so an absolute
+			// tolerance of 1e-4 comfortably absorbs rounding noise while still
+			// catching any real numeric corruption in the round trip.
+			if diff := cmp.Diff(want, got, cmpopts.IgnoreMapEntries(ignoreUnpredictable), cmpopts.EquateApprox(0, 1e-4)); diff != "" {
 				t.Errorf("want != got:\n%v\n", diff)
 			}
 		})
diff --git a/tests/testdata/e2e/GHE_Dev_no_objects.json b/tests/testdata/e2e/GHE_Dev_no_objects.json
index 6f7f827..4084dba 100644
--- a/tests/testdata/e2e/GHE_Dev_no_objects.json
+++ b/tests/testdata/e2e/GHE_Dev_no_objects.json
@@ -1293,50 +1293,50 @@
   "SnapPoints": [
     {
       "Position": {
-        "x": -36.0014,
-        "y": 1.6801,
+        "x": -36.001,
+        "y": 1.68,
         "z": -40
       },
       "Rotation": {
-        "x": -0.0001,
-        "y": 180.0016,
+        "x": 0,
+        "y": 180,
         "z": 0
       }
     },
     {
       "Position": {
         "x": -12.001,
-        "y": 1.6801,
+        "y": 1.68,
         "z": -40
       },
       "Rotation": {
-        "x": -0.0003,
-        "y": 180.0298,
-        "z": -0.0001
+        "x": 0,
+        "y": 180,
+        "z": 0
       }
     },
     {
       "Position": {
         "x": 12.001,
-        "y": 1.6801,
+        "y": 1.68,
         "z": -40
       },
       "Rotation": {
-        "x": -0.0003,
-        "y": 180.0294,
+        "x": 0,
+        "y": 180,
         "z": 0
       }
     },
     {
       "Position": {
-        "x": 36.0009,
-        "y": 1.6801,
+        "x": 36.001,
+        "y": 1.68,
         "z": -40
       },
       "Rotation": {
-        "x": -0.0003,
-        "y": 180.0302,
-        "z": -0.0001
+        "x": 0,
+        "y": 180,
+        "z": 0
       }
     }
   ],
diff --git a/tests/testdata/e2e/GHE_Dev_no_objects_no_lua.json b/tests/testdata/e2e/GHE_Dev_no_objects_no_lua.json
index d34dc59..464bb3b 100644
--- a/tests/testdata/e2e/GHE_Dev_no_objects_no_lua.json
+++ b/tests/testdata/e2e/GHE_Dev_no_objects_no_lua.json
@@ -1293,50 +1293,50 @@
   "SnapPoints": [
     {
       "Position": {
-        "x": -36.0014,
-        "y": 1.6801,
+        "x": -36.001,
+        "y": 1.68,
         "z": -40
       },
       "Rotation": {
-        "x": -0.0001,
-        "y": 180.0016,
+        "x": 0,
+        "y": 180,
         "z": 0
       }
     },
     {
       "Position": {
         "x": -12.001,
-        "y": 1.6801,
+        "y": 1.68,
         "z": -40
       },
       "Rotation": {
-        "x": -0.0003,
-        "y": 180.0298,
-        "z": -0.0001
+        "x": 0,
+        "y": 180,
+        "z": 0
       }
     },
     {
       "Position": {
         "x": 12.001,
-        "y": 1.6801,
+        "y": 1.68,
         "z": -40
       },
       "Rotation": {
-        "x": -0.0003,
-        "y": 180.0294,
+        "x": 0,
+        "y": 180,
         "z": 0
       }
     },
     {
       "Position": {
-        "x": 36.0009,
-        "y": 1.6801,
+        "x": 36.001,
+        "y": 1.68,
         "z": -40
       },
       "Rotation": {
-        "x": -0.0003,
-        "y": 180.0302,
-        "z": -0.0001
+        "x": 0,
+        "y": 180,
+        "z": 0
       }
     }
   ],