diff --git a/_server/editor.js b/_server/editor.js
index 525f8abe..25dcbcf3 100644
--- a/_server/editor.js
+++ b/_server/editor.js
@@ -405,20 +405,22 @@ editor.prototype.updateLastUsedMap = function () {
     ctx.strokeStyle = 'rgba(255,128,0,0.85)';
     ctx.lineWidth = 4;
     for (var i = 0; i < editor.uivalues.lastUsed.length; ++i) {
-        var x = i % core.__SIZE__, y = parseInt(i / core.__SIZE__);
-        var info = editor.uivalues.lastUsed[i];
-        if (!info || !info.images) continue;
-        if (info.isTile) {
-            ctx.drawImage(core.material.images.tilesets[info.images], 32 * info.x, 32 * info.y, 32, 32, x*32, y*32, 32, 32);
-        } else if (info.images == 'autotile') {
-            ctx.drawImage(core.material.images.autotile[info.id], 0, 0, 32, 32, x * 32, y * 32, 32, 32);
-        } else {
-            var per_height = info.images.endsWith('48') ? 48 : 32;
-            ctx.drawImage(core.material.images[info.images], 0, info.y * per_height, 32, per_height, x * 32, y * 32, 32, 32);
-        }
-        if (selectBox.isSelected() && editor.info.id == info.id) {
-            ctx.strokeRect(32 * x + 2, 32 * y + 2, 28, 28);
-        }
+        try {
+            var x = i % core.__SIZE__, y = parseInt(i / core.__SIZE__);
+            var info = editor.uivalues.lastUsed[i];
+            if (!info || !info.images) continue;
+            if (info.isTile && core.material.images.tilesets[info.images]) {
+                ctx.drawImage(core.material.images.tilesets[info.images], 32 * info.x, 32 * info.y, 32, 32, x*32, y*32, 32, 32);
+            } else if (info.images == 'autotile' && core.material.images.autotile[info.id]) {
+                ctx.drawImage(core.material.images.autotile[info.id], 0, 0, 32, 32, x * 32, y * 32, 32, 32);
+            } else {
+                var per_height = info.images.endsWith('48') ? 48 : 32;
+                ctx.drawImage(core.material.images[info.images], 0, info.y * per_height, 32, per_height, x * 32, y * 32, 32, 32);
+            }
+            if (selectBox.isSelected() && editor.info.id == info.id) {
+                ctx.strokeRect(32 * x + 2, 32 * y + 2, 28, 28);
+            }
+        } catch (e) {}
     }
 }
 
diff --git a/libs/loader.js b/libs/loader.js
index 1804c82f..5231f8d8 100644
--- a/libs/loader.js
+++ b/libs/loader.js
@@ -207,9 +207,7 @@ loader.prototype._loadAnimates = function () {
                         core.loader._loadAnimate(t, animates[name]);
                 }
             }
-        }, null, true, function (percentage) {
-            core.loader._setStartProgressVal(percentage * 100);
-        });
+        }, null, true);
     } else {
         core.animates.forEach(function (t) {
             core.http('GET', 'project/animates/' + t + ".animate?v=" + main.version, null, function (content) {
@@ -284,8 +282,6 @@ loader.prototype._loadMusic = function () {
                     core.loader._loadOneSound_decodeData(name, data[name]);
                 }
             }
-        }, null, false, function (percentage) {
-            core.loader._setStartProgressVal(percentage * 100);
         });
     } else {
         core.sounds.forEach(function (t) {
diff --git a/libs/maps.js b/libs/maps.js
index ea3a89a1..a5cb4ada 100644
--- a/libs/maps.js
+++ b/libs/maps.js
@@ -258,6 +258,11 @@ maps.prototype.saveMap = function (floorId) {
         }
         return map;
     }
+    // 砍层状态：直接返回
+    if (main.mode == 'play' && (flags.__removed__ || []).indexOf(floorId) >= 0) {
+        return { canFlyTo: false, cannotViewMap: true };
+    }
+
     var map = maps[floorId], floor = core.floors[floorId];
     var blocks = this._getMapArrayFromBlocks(map.blocks, floor.width, floor.height, true);
     if (main.mode == 'editor') return blocks;
@@ -293,6 +298,23 @@ maps.prototype.loadMap = function (data, floorId) {
     return this.loadFloor(floorId, data[floorId]);
 }
 
+////// 删除地图，不计入存档 //////
+maps.prototype.removeMaps = function (fromId, toId) {
+    if (!core.isPlaying()) return;
+    toId = toId || fromId;
+    var fromIndex = core.floorIds.indexOf(fromId),
+        toIndex = core.floorIds.indexOf(toId);
+    if (toIndex < 0) toIndex = core.floorIds.length - 1;
+    flags.__removed__ = flags.__removed__ || [];
+    for (var i = fromIndex; i <= toIndex; ++i) {
+        var floorId = core.floorIds[i];
+        delete flags.__visited__[floorId];
+        flags.__removed__.push(floorId);
+        core.status.maps[floorId].canFlyTo = false;
+        core.status.maps[floorId].cannotViewMap = true;
+    }
+}
+
 ////// 更改地图画布的尺寸
 maps.prototype.resizeMap = function (floorId) {
     floorId = floorId || core.status.floorId;