diff --git a/dist/entry.js b/dist/entry.js
index b0855255e0..e741592d7f 100644
--- a/dist/entry.js
+++ b/dist/entry.js
@@ -6650,6 +6650,9 @@ Entry.Container.prototype.getCachedPicture = function(b) {
 Entry.Container.prototype.cachePicture = function(b, a) {
   this.cachedPicture[b] = a;
 };
+Entry.Container.prototype.removeCachedPicture = function(b) {
+  delete this.cachedPicture[b];
+};
 Entry.Container.prototype.toJSON = function() {
   for (var b = [], a = this.objects_.length, c = 0;c < a;c++) {
     b.push(this.objects_[c].toJSON());
diff --git a/dist/entry.min.js b/dist/entry.min.js
index 90436b52a6..073351a0fd 100644
--- a/dist/entry.min.js
+++ b/dist/entry.min.js
@@ -714,10 +714,11 @@ d[f],c.push([e.name,e.id]);break;case "variables":d=Entry.variableContainer.vari
 Entry.Container.prototype.clearRunningStateOnScene=function(){this.mapObjectOnScene(function(b){b.clearExecutor();for(var a=b.clonedEntities.length;0<a;a--)b.clonedEntities[a-1].removeClone();b.clonedEntities=[]})};Entry.Container.prototype.mapEntity=function(b,a){for(var c=this.objects_.length,d=[],e=0;e<c;e++)d.push(b(this.objects_[e].entity,a));return d};
 Entry.Container.prototype.mapEntityOnScene=function(b,a){for(var c=this.getCurrentObjects(),d=c.length,e=[],f=0;f<d;f++)e.push(b(c[f].entity,a));return e};Entry.Container.prototype.mapEntityIncludeClone=function(b,a){for(var c=this.objects_,d=c.length,e=[],f=0;f<d;f++){var g=c[f],h=g.clonedEntities.length;e.push(b(g.entity,a));for(var k=0;k<h;k++){var l=g.clonedEntities[k];l&&!l.isStamp&&e.push(b(l,a))}}return e};
 Entry.Container.prototype.mapEntityIncludeCloneOnScene=function(b,a){for(var c=this.getCurrentObjects(),d=c.length,e=[],f=0;f<d;f++){var g=c[f],h=g.clonedEntities.length;e.push(b(g.entity,a));for(var k=0;k<h;k++){var l=g.clonedEntities[k];l&&!l.isStamp&&e.push(b(l,a))}}return e};Entry.Container.prototype.getCachedPicture=function(b){Entry.assert("string"==typeof b,"pictureId must be string");return this.cachedPicture[b]};Entry.Container.prototype.cachePicture=function(b,a){this.cachedPicture[b]=a};
-Entry.Container.prototype.toJSON=function(){for(var b=[],a=this.objects_.length,c=0;c<a;c++)b.push(this.objects_[c].toJSON());return b};Entry.Container.prototype.takeSequenceSnapshot=function(){for(var b=this.objects_.length,a=this.objects_,c=0;c<b;c++)a[c].index=c};Entry.Container.prototype.loadSequenceSnapshot=function(){for(var b=this.objects_.length,a=Array(b),c=0;c<b;c++){var d=this.objects_[c];a[d.index||c]=d;delete d.index}this.objects_=a;this.setCurrentObjects();Entry.stage.sortZorder();this.updateListView()};
-Entry.Container.prototype.getInputValue=function(){return this.inputValue.getValue()};Entry.Container.prototype.setInputValue=function(b){b?this.inputValue.setValue(b):this.inputValue.setValue(0)};Entry.Container.prototype.resetSceneDuringRun=function(){this.mapEntityOnScene(function(b){b.loadSnapshot();b.object.filters=[];b.resetFilter();b.dialog&&b.dialog.remove();b.shape&&b.removeBrush()});this.clearRunningStateOnScene()};
-Entry.Container.prototype.setCopiedObject=function(b){this.copiedObject=b};Entry.Container.prototype.updateObjectsOrder=function(){for(var b=Entry.scene.getScenes(),a=[],c=0;c<b.length;c++)for(var d=this.getSceneObjects(b[c]),e=0;e<d.length;e++)a.push(d[e]);this.objects_=a};Entry.Container.prototype.getSceneObjects=function(b){b=b||Entry.scene.selectedScene;for(var a=[],c=this.getAllObjects(),d=0;d<c.length;d++)b.id==c[d].scene.id&&a.push(c[d]);return a};
-Entry.Container.prototype.setCurrentObjects=function(){this.currentObjects_=this.getSceneObjects()};Entry.Container.prototype.getCurrentObjects=function(){var b=this.currentObjects_;b&&0!==b.length||this.setCurrentObjects();return this.currentObjects_};Entry.Container.prototype.getProjectWithJSON=function(b){b.objects=Entry.container.toJSON();b.variables=Entry.variableContainer.getVariableJSON();b.messages=Entry.variableContainer.getMessageJSON();b.scenes=Entry.scene.toJSON();return b};
+Entry.Container.prototype.removeCachedPicture=function(b){delete this.cachedPicture[b]};Entry.Container.prototype.toJSON=function(){for(var b=[],a=this.objects_.length,c=0;c<a;c++)b.push(this.objects_[c].toJSON());return b};Entry.Container.prototype.takeSequenceSnapshot=function(){for(var b=this.objects_.length,a=this.objects_,c=0;c<b;c++)a[c].index=c};
+Entry.Container.prototype.loadSequenceSnapshot=function(){for(var b=this.objects_.length,a=Array(b),c=0;c<b;c++){var d=this.objects_[c];a[d.index||c]=d;delete d.index}this.objects_=a;this.setCurrentObjects();Entry.stage.sortZorder();this.updateListView()};Entry.Container.prototype.getInputValue=function(){return this.inputValue.getValue()};Entry.Container.prototype.setInputValue=function(b){b?this.inputValue.setValue(b):this.inputValue.setValue(0)};
+Entry.Container.prototype.resetSceneDuringRun=function(){this.mapEntityOnScene(function(b){b.loadSnapshot();b.object.filters=[];b.resetFilter();b.dialog&&b.dialog.remove();b.shape&&b.removeBrush()});this.clearRunningStateOnScene()};Entry.Container.prototype.setCopiedObject=function(b){this.copiedObject=b};
+Entry.Container.prototype.updateObjectsOrder=function(){for(var b=Entry.scene.getScenes(),a=[],c=0;c<b.length;c++)for(var d=this.getSceneObjects(b[c]),e=0;e<d.length;e++)a.push(d[e]);this.objects_=a};Entry.Container.prototype.getSceneObjects=function(b){b=b||Entry.scene.selectedScene;for(var a=[],c=this.getAllObjects(),d=0;d<c.length;d++)b.id==c[d].scene.id&&a.push(c[d]);return a};Entry.Container.prototype.setCurrentObjects=function(){this.currentObjects_=this.getSceneObjects()};
+Entry.Container.prototype.getCurrentObjects=function(){var b=this.currentObjects_;b&&0!==b.length||this.setCurrentObjects();return this.currentObjects_};Entry.Container.prototype.getProjectWithJSON=function(b){b.objects=Entry.container.toJSON();b.variables=Entry.variableContainer.getVariableJSON();b.messages=Entry.variableContainer.getMessageJSON();b.scenes=Entry.scene.toJSON();return b};
 Entry.Container.prototype.blurAllInputs=function(){this.getSceneObjects().map(function(b){b=b.view_.getElementsByTagName("input");for(var a=0,c=b.length;a<c;a++)b[a].blur()})};Entry.Container.prototype.showProjectAnswer=function(){var b=this.inputValue;b&&b.setVisible(!0)};
 Entry.Container.prototype.hideProjectAnswer=function(b){if((b=this.inputValue)&&b.isVisible()&&!Entry.engine.isState("run")){for(var a=Entry.container.getAllObjects(),c=["ask_and_wait","get_canvas_input_value","set_visible_answer"],d=0,e=a.length;d<e;d++)for(var f=a[d].script,g=0;g<c.length;g++)if(f.hasBlockType(c[g]))return;b.setVisible(!1)}};Entry.Container.prototype.getView=function(){return this._view};Entry.Container.prototype.resize=function(){};
 Entry.Container.prototype._rightClick=function(b){b.stopPropagation&&b.stopPropagation();var a=[{text:Lang.Blocks.Paste_blocks,enable:!Entry.engine.isState("run")&&!!Entry.container.copiedObject,callback:function(){Entry.container.copiedObject?Entry.container.addCloneObject(Entry.container.copiedObject):Entry.toast.alert(Lang.Workspace.add_object_alert,Lang.Workspace.object_not_found_for_paste)}}];Entry.ContextMenu.show(a,"workspace-contextmenu",{x:b.clientX,y:b.clientY})};Entry.db={data:{},typeMap:{}};(function(b){b.add=function(a){this.data[a.id]=a;var b=a.type;void 0===this.typeMap[b]&&(this.typeMap[b]={});this.typeMap[b][a.id]=a};b.has=function(a){return this.data.hasOwnProperty(a)};b.remove=function(a){this.has(a)&&(delete this.typeMap[this.data[a].type][a],delete this.data[a])};b.get=function(a){return this.data[a]};b.find=function(){};b.clear=function(){this.data={};this.typeMap={}}})(Entry.db);Entry.Dom=function(b,a){var c=/<(\w+)>/,d;d=b instanceof HTMLElement?$(b):b instanceof jQuery?b:c.test(b)?$(b):$("<"+b+"></"+b+">");if(void 0===a)return d;a.id&&d.attr("id",a.id);a.class&&d.addClass(a.class);a.classes&&a.classes.map(function(a){d.addClass(a)});a.src&&d.attr("src",a.src);a.parent&&a.parent.append(d);d.bindOnClick=function(){var a,b,c=function(a){a.stopImmediatePropagation();a.handled||(a.handled=!0,b.call(this,a))};1<arguments.length?(b=arguments[1]instanceof Function?arguments[1]:
diff --git a/src/container.js b/src/container.js
index 7ba54d01a4..f6161b1e51 100644
--- a/src/container.js
+++ b/src/container.js
@@ -767,6 +767,14 @@ Entry.Container.prototype.cachePicture = function(pictureId, image) {
     this.cachedPicture[pictureId] = image;
 };
 
+/**
+ * cache picture
+ * @param {!picture object} pictureModel
+ */
+Entry.Container.prototype.removeCachedPicture = function(pictureId) {
+    delete this.cachedPicture[pictureId];
+};
+
 /**
  * convert this object's data to JSON.
  * @return {JSON}