diff --git a/web/app/3d/revolve.js b/web/app/3d/revolve.js
index 5d05655d..e2f69654 100644
--- a/web/app/3d/revolve.js
+++ b/web/app/3d/revolve.js
@@ -68,6 +68,24 @@ export function revolveToWireframe(polygons, axisSegment, angle, resolution) {
   return out;
 }
 
+export function revolveToTriangles(polygons, axisSegment, angle, resolution) {
+  const out = [];
+  //add initial polygon
+  revolveIterator(polygons, axisSegment, angle, resolution, (pOrig, pRot, p, q) => {
+    //skip point if they are on the axis of revolving
+    if (!math.equal(0, math.distanceAB3(pOrig[q], pRot[q]))) {
+      out.push( [pOrig[p], pOrig[q], pRot[q]] );
+    }
+    if (!math.equal(0, math.distanceAB3(pOrig[p], pRot[p]))) {
+      out.push( [ pRot[q],  pRot[p], pOrig[p]] );
+    }
+  });
+  if (angle < 0) {
+    out.forEach(tr => tr.reverse());
+  }
+  return out;
+}
+
 export function revolveIterator(polygons, axisSegment, angle, resolution, callback) {
   
   if (resolution < 2) resolution = 2;
diff --git a/web/app/3d/solid.js b/web/app/3d/solid.js
index 7968cbe3..97eb5555 100644
--- a/web/app/3d/solid.js
+++ b/web/app/3d/solid.js
@@ -1,7 +1,7 @@
 import {HashTable} from '../utils/hashmap'
 import Vector from '../math/vector'
 import Counters from './counters'
-import {reconstructSketchBounds} from './workbench'
+import {findOutline, segmentsToPaths} from './workbench'
 import {Matrix3, AXIS} from '../math/l3space'
 import {arrFlatten1L, isCurveClass} from './cad-utils'
 import DPR from '../utils/dpr'
@@ -91,7 +91,7 @@ Solid.prototype.setupGeometry = function() {
       off = geom.vertices.length;
     }
     this.collectCurvedSurface(polyFace);
-    this.collectWires(polyFace);
+    this.collectWires(polyFace, group.polygons);
   }
 
   geom.mergeVertices();
@@ -117,7 +117,7 @@ Solid.prototype.collectCurvedSurface = function(face) {
   face.curvedSurfaces = surfaces;
 };
 
-Solid.prototype.collectWires = function(face) {
+Solid.prototype.collectWires = function(face, facePolygons) {
 
   function contains(planes, plane) {
     for (var j = 0; j < planes.length; j++) {
@@ -127,7 +127,10 @@ Solid.prototype.collectWires = function(face) {
     }
     return false;
   }
-  var paths = reconstructSketchBounds(this.csg, face, true);
+  
+  const outline = findOutline(facePolygons);
+  const paths = segmentsToPaths(outline);
+
   for (var i = 0; i < paths.length; i++) {
     var path = paths[i];
     var p, q, n = path.vertices.length;
diff --git a/web/app/3d/wizards/revolve.js b/web/app/3d/wizards/revolve.js
index cb9eaa6e..bc8e8631 100644
--- a/web/app/3d/wizards/revolve.js
+++ b/web/app/3d/wizards/revolve.js
@@ -3,8 +3,8 @@ import * as workbench from '../workbench'
 import * as cad_utils from '../cad-utils'
 import Vector from '../../math/vector'
 import {Matrix3, ORIGIN} from '../../math/l3space'
-import {revolveToWireframe} from '../revolve'
-import {OpWizard, IMAGINE_MATERIAL, BASE_MATERIAL} from './wizard-commons'
+import {revolveToTriangles} from '../revolve'
+import {OpWizard, IMAGINARY_SURFACE_MATERIAL, } from './wizard-commons'
 
 export function RevolveWizard(app, face, initParams) {
   OpWizard.call(this, app.viewer, initParams);
@@ -32,14 +32,26 @@ RevolveWizard.prototype.updatePolygons = function() {
 };
 
 RevolveWizard.prototype.update = function(angle, resolution) {
-  let linesCounter = 0;
-  const segments = revolveToWireframe(this.polygons, this.polygons[0], angle / 180 * Math.PI, resolution);
-  for (let segment of segments) {
-    this.setupLine(linesCounter ++, segment[0], segment[1], IMAGINE_MATERIAL);
+  if (this.mesh) {
+    this.mesh.geometry.dispose();
+    this.previewGroup.remove(this.mesh);
   }
-  for (var i = 0; i < this.lines.length; i++) {
-    this.lines[i].visible = i < linesCounter;
+  const triangles = revolveToTriangles(this.polygons, this.polygons[0], angle / 180 * Math.PI, resolution);
+  const geometry = new THREE.Geometry();
+
+  for (let tr of triangles) {
+    const a = geometry.vertices.length;
+    const b = a + 1;
+    const c = a + 2;
+    const face = new THREE.Face3(a, b, c);
+    tr.forEach(v => geometry.vertices.push(v.three()));
+    geometry.faces.push(face);
   }
+  geometry.mergeVertices();
+  geometry.computeFaceNormals();
+  
+  this.mesh = new THREE.Mesh(geometry, IMAGINARY_SURFACE_MATERIAL);
+  this.previewGroup.add(this.mesh);
 };
 
 RevolveWizard.prototype.createUI = function (angle, resolution) {
diff --git a/web/app/3d/wizards/wizard-commons.js b/web/app/3d/wizards/wizard-commons.js
index 78404ea9..9cd9ec43 100644
--- a/web/app/3d/wizards/wizard-commons.js
+++ b/web/app/3d/wizards/wizard-commons.js
@@ -1,7 +1,6 @@
 import DPR from '../../utils/dpr'
 import * as tk from '../../ui/toolkit'
 
-
 const IMAGINE_MATERIAL = new THREE.LineBasicMaterial({
   color: 0xFA8072,
   linewidth: 1/DPR,
@@ -16,6 +15,15 @@ const BASE_MATERIAL = new THREE.LineBasicMaterial({
   depthTest: false
 });
 
+const IMAGINARY_SURFACE_MATERIAL = new THREE.MeshPhongMaterial({
+  vertexColors: THREE.FaceColors,
+  color: 0xFA8072,
+  transparent: true,
+  opacity: 0.5,
+  shininess: 0,
+  side : THREE.DoubleSide
+});
+
 export function Wizard(viewer, initParams) {
   if (!initParams) initParams = this.DEFAULT_PARAMS;
   this.viewer = viewer;
@@ -120,4 +128,4 @@ OpWizard.prototype.dispose = function() {
   this.viewer.render();
 };
 
-export {OpWizard, IMAGINE_MATERIAL, BASE_MATERIAL}
\ No newline at end of file
+export {OpWizard, IMAGINE_MATERIAL, IMAGINARY_SURFACE_MATERIAL, BASE_MATERIAL}
\ No newline at end of file
diff --git a/web/app/3d/workbench.js b/web/app/3d/workbench.js
index 53d86bb6..521088c5 100644
--- a/web/app/3d/workbench.js
+++ b/web/app/3d/workbench.js
@@ -344,7 +344,7 @@ function getOutlineByCollision(segments, outerEdges) {
   return outline;
 }
 
-function findOutline (planePolygons, outer) {
+export function findOutline (planePolygons) {
   var segmentsByPolygon = polygonsToSegments(planePolygons);
   //simplifySegments(segmentsByPolygon);
   var planeSegments = cad_utils.arrFlatten1L(segmentsByPolygon);
@@ -455,7 +455,7 @@ function deleteRedundantPoints(path) {
   return cleanedPath;
 }
 
-function segmentsToPaths(segments) {
+export function segmentsToPaths(segments) {
 
   var veq = math.strictEqual;
   var paths = [];