1) First we need to setup the Spiral Xtra by double-clicking the icon shown above. Above are the settings I'm going to be using. I highly recommend that you experiment with different settings here, there are many possibilities.

2) Next on your document, click-drag out a new spiral like shown above. It can really be any size and it doesn't matter where the end or beginning end up.

3) Now while the spiral is still selected, go under the Xtras menu -> Distort -> Add Points or use the Xtra icon tool shown above.

This will add new points between all of the existing points in the Spiral.

4) Next we need to setup the Bend Xtra tool. Bring up the Bend options by double-clicking the Xtra icon shown above. Enter in an amount that you wish to work with. Here I chose to keep the default amount of 5.

5) While the spiral is still selected, click and drag from the center to the top of the spiral. You will see the spiral slowly turn into a spider web shape. When you're happy, release the mouse button and you'll end up with the standard web shape shown above.

6) To start finishing up the spider web we'll draw in the lines that hold the whole thing together. It's much easier to have Snap to Point turned on for this step, so go under the View menu and turn that on.

Starting with the outside points of the web, drag a line to the center. Make sure that the line overlaps all of the inner points as you draw these in. Watch the animation above to see it in action.

7) After you are finished with the lines, you can then go back and extend them out of the web so they can anchor to something.

Don't worry if the center is off, because in the real world, spider webs are not perfect either..... heh heh. But if you need to, go back into the center and add more web lines if you wish.

To get half of a web like shown at the top of this page, just use the Knife tool and cut away the parts you don't want. Then fill in the gaps with anchor lines.

For more variation, use the 3D Rotation Xtra on the web. Group all the shapes together and distort it with the Xtra. You can really get some great looking web shapes.