diff --git a/web/app/cad/scene/controls/pickControlPlugin.js b/web/app/cad/scene/controls/pickControlPlugin.js
index dbf6e21e..849a81c7 100644
--- a/web/app/cad/scene/controls/pickControlPlugin.js
+++ b/web/app/cad/scene/controls/pickControlPlugin.js
@@ -174,6 +174,9 @@ export function activate(context) {
     for (let i = 0; i < pickResults.length; i++) {
       const pickResult = pickResults[i];
       for (let picker of pickers) {
+        if (pickResult.object && pickResult.object.passRayCast && pickResult.object.passRayCast(pickResults)) {
+          // continue;
+        }
         if (picker(pickResult)) {
           return;
         }
diff --git a/web/app/cad/scene/entityContextPlugin.js b/web/app/cad/scene/entityContextPlugin.js
index e1dd639f..7e7b780d 100644
--- a/web/app/cad/scene/entityContextPlugin.js
+++ b/web/app/cad/scene/entityContextPlugin.js
@@ -2,7 +2,7 @@ import {state} from 'lstream';
 
 import {addToListInMap} from 'gems/iterables';
 import {EMPTY_ARRAY} from '../../../../modules/gems/iterables';
-import {DATUM, FACE, SHELL, SKETCH_OBJECT, EDGE} from './entites';
+import {DATUM, FACE, SHELL, SKETCH_OBJECT, EDGE, LOOP} from './entites';
 
 export const SELECTABLE_ENTITIES = [FACE, EDGE, SKETCH_OBJECT, DATUM, SHELL];
 
@@ -34,7 +34,13 @@ export function activate(ctx) {
   ctx.services.marker.$markedEntities.attach(marked => {
     let byType = new Map();
     marked.forEach((obj) => {
-      addToListInMap(byType, obj.TYPE, obj);
+      if (obj.TYPE === LOOP) {
+        if (byType[FACE] && !byType[FACE].includes(obj.face)) {
+          addToListInMap(byType, FACE, obj.face);
+        }
+      } else {
+        addToListInMap(byType, obj.TYPE, obj);
+      }
     });
     SELECTABLE_ENTITIES.forEach(entityType => {
       let entities = byType.get(entityType);
diff --git a/web/app/cad/scene/views/openFaceView.js b/web/app/cad/scene/views/openFaceView.js
index fa14284c..91ea5e32 100644
--- a/web/app/cad/scene/views/openFaceView.js
+++ b/web/app/cad/scene/views/openFaceView.js
@@ -2,6 +2,7 @@ import {setAttribute} from '../../../../../modules/scene/objectData';
 import {FACE, SHELL} from '../entites';
 import {NULL_COLOR, SELECTION_COLOR, setFacesColor, SketchingView} from './faceView';
 import {View} from './view';
+import {SketchMesh} from './shellView';
 
 export class OpenFaceShellView extends View {
 
@@ -54,7 +55,7 @@ export class OpenFaceView extends SketchingView {
     geometry.faces.push(new THREE.Face3(0, 2, 3));
     geometry.faces.forEach(f => setAttribute(f, FACE, this));
     geometry.computeFaceNormals();
-    this.mesh = new THREE.Mesh(geometry, this.material);
+    this.mesh = new SketchMesh(geometry, this.material);
     this.rootGroup.add(this.mesh);
   }
 
diff --git a/web/app/cad/scene/views/shellView.js b/web/app/cad/scene/views/shellView.js
index 7b9c8e40..f6ddf181 100644
--- a/web/app/cad/scene/views/shellView.js
+++ b/web/app/cad/scene/views/shellView.js
@@ -1,10 +1,11 @@
 import {View} from './view';
 import * as SceneGraph from '../../../../../modules/scene/sceneGraph';
-import {setAttribute} from '../../../../../modules/scene/objectData';
+import {getAttribute, setAttribute} from '../../../../../modules/scene/objectData';
 import {createSolidMaterial} from '../wrappers/sceneObject';
 import {FaceView, SELECTION_COLOR} from './faceView';
 import {EdgeView} from './edgeView';
-import {SHELL} from '../entites';
+import {FACE, SHELL} from '../entites';
+import {Mesh} from 'three';
 
 export class ShellView extends View {
 
@@ -27,7 +28,7 @@ export class ShellView extends View {
 
     const geometry = new THREE.Geometry();
     geometry.dynamic = true;
-    this.mesh = new THREE.Mesh(geometry, this.material);
+    this.mesh = new SketchMesh(geometry, this.material);
     this.rootGroup.add(this.mesh);
     
 
@@ -68,4 +69,30 @@ export class ShellView extends View {
     }
     super.dispose();
   }
+}
+
+export class SketchMesh extends Mesh {
+  
+  constructor(geometry, material) {
+    super(geometry, material);
+  }
+
+  passRayCast(hits) {
+    for (let hit of hits) {
+      if (hit.object === this && hit.face) {
+        let faceView = getAttribute(hit.face, FACE);
+        if (faceView) {
+          if (faceView.sketchLoopViews.find(v => hits.find(h => v.mesh.geometry.faces.indexOf(h.face) !== -1))) {
+            return true;
+          }
+        }
+
+      }
+    }
+  }
+  
+  passMouseEvent(e) {
+    return this.passRayCast(e.hits);
+  };
+
 }
\ No newline at end of file
diff --git a/web/app/cad/scene/views/sketchLoopView.js b/web/app/cad/scene/views/sketchLoopView.js
index f593c7a3..5575e39b 100644
--- a/web/app/cad/scene/views/sketchLoopView.js
+++ b/web/app/cad/scene/views/sketchLoopView.js
@@ -1,4 +1,4 @@
-import {View} from './view';
+import {MarkTracker, View} from './view';
 import * as SceneGraph from 'scene/sceneGraph';
 import {tessellateLoopsOnSurface} from '../../tess/brep-tess';
 import {createSolidMaterial} from '../wrappers/sceneObject';
@@ -9,7 +9,7 @@ import Vector from '../../../../../modules/math/vector';
 import {LOOP} from '../entites';
 import {setAttribute} from '../../../../../modules/scene/objectData';
 
-export class SketchLoopView extends View {
+export class SketchLoopView extends MarkTracker(View) {
   constructor(mLoop) {
     super(mLoop);
     this.rootGroup = SceneGraph.createGroup();
@@ -17,11 +17,13 @@ export class SketchLoopView extends View {
     const geometry = new Geometry();
     geometry.dynamic = true;
     this.mesh = new Mesh(geometry, createSolidMaterial({
-      color: 0xDBFFD9,
+      color: SKETCH_LOOP_DEFAULT_HIGHLIGHT_COLOR,
       side: DoubleSide,
+      // transparent: true,
+      depthTest: true,
+      depthWrite: false,
       polygonOffset: true,
-      polygonOffsetFactor: 1,
-      polygonOffsetUnits: 0.1,
+      polygonOffsetFactor: -4,
       visible: false
     }));
     let surface = mLoop.face.surface;
@@ -44,21 +46,26 @@ export class SketchLoopView extends View {
 
     this.rootGroup.add(this.mesh);
     this.mesh.onMouseEnter = (e) => {
-      this.mesh.material.visible = true;
+      this.mark(SKETCH_LOOP_DEFAULT_HIGHLIGHT_COLOR, 5);
       e.viewer.requestRender();
     };
     this.mesh.onMouseLeave = (e) => {
-      this.mesh.material.visible = false;
+      this.withdraw(5);
       e.viewer.requestRender();
     };
   }
 
-  mark(color) {
-    
+  mark(color = SKETCH_LOOP_DEFAULT_SELECT_COLOR, priority = 10) {
+    super.mark(color, priority);
+  }
+  
+  markImpl(color) {
+    this.mesh.material.visible = true;
+    this.mesh.material.color.setHex(color)
   }
 
-  withdraw(color) {
-    
+  withdrawImpl() {
+    this.mesh.material.visible = false;
   }
 
   dispose() {
@@ -66,4 +73,7 @@ export class SketchLoopView extends View {
     this.mesh.geometry.dispose();
     super.dispose();
   }
-}
\ No newline at end of file
+}
+
+const SKETCH_LOOP_DEFAULT_HIGHLIGHT_COLOR = 0xDBFFD9;
+const SKETCH_LOOP_DEFAULT_SELECT_COLOR = 0xCCEFCA;
\ No newline at end of file
diff --git a/web/app/cad/scene/views/view.js b/web/app/cad/scene/views/view.js
index b73b9058..a6518374 100644
--- a/web/app/cad/scene/views/view.js
+++ b/web/app/cad/scene/views/view.js
@@ -10,11 +10,10 @@ export class View {
   setVisible(value) {
   }
 
-  mark(color) {
-    
+  mark(color, priority) {
   }
 
-  withdraw() {
+  withdraw(priority) {
   }
   
   dispose() {
@@ -23,3 +22,41 @@ export class View {
   };
 }
 
+
+export const MarkTracker = ViewClass => class extends ViewClass {
+  
+  constructor(model) {
+    super(model);
+    this.marks = new Map();
+  }
+
+  mark(color, priority) {
+    this.marks.set(priority, color);
+    this.doMark();
+  }
+
+  withdraw(priority) {
+    this.marks.delete(priority);
+    this.doMark();
+  }
+  
+  doMark() {
+    let keys = this.marks.keys();
+    let maxPriority = - Number.MAX_VALUE; 
+    for (let key of keys) {
+      if (key > maxPriority) {
+        maxPriority = key; 
+      }
+    }
+    let color = this.marks.get(maxPriority);
+    if (color !== undefined) {
+      this.markImpl(color)
+    } else {
+      this.withdrawImpl(color)
+    }
+  }
+
+  markImpl(color) {}
+
+  withdrawImpl(color) {}
+};
\ No newline at end of file