Creating the stained window frame
Start off by creating a new 3DS file , then go through
File>Import and browse to the AI file to import it. Once you get to the
AI Import window, select the option to merge the objects with the current scene. On the next window Select
Single Object to be able to manipulate the object through the Extrude Modifier easily. Once you click
OK you should see your design path laying down in the middle of your scene.

We now have one copy of the path on the scene. To complete this project we are going to need two paths, one for the creation of the frame and the second for creating the actual stained glass. We can easily duplicate the path on stage by holding down
Shift and then moving the path on the axis. That should trigger the
Clone Options window to pop up, select
Copy as the
Object Type and click
OK.

At this stage you can optionally rename your vector graphics to
frame and
glass to later identify them easily.

We are going to hide the Glass object because we do not need it now. To do this simply
select it and then
Right-Click on it to access the
Display menu and select
Hide Selection to do just that.

Moving on,
Select the
Frame Object on the scene and then access the
Modifier Panel and select the
Extrude Modifier from the list to add the
Extrude Modifier to the frame modifier stack. Scroll down to the
Parameters rollout and set the extrude
Amount to
0.5 to add depth to your Frame Object. This should finish up our work for the frame of our stained glass.
Creating the stained glass
We are going to start working on our actual stained glass. To start off we need to
unhide the
Glass Object, to do this simply
right-click any spot on the scene and then select
Unhide All from the
Display menu.

The first step in working with our
Glass Object is to remove the
outer rectangular shape. To do this,
select the
Glass Object and then access the
Modify Tab to change the
Selection Mode to
Spline. You will then have to select only the outer rectangular shape by
clicking once on it and then pressing
Delete on your keyboard to delete it.

You now need to add an
Extrude Modifier to the object's Modifier Stack by selecting it from the list. Once you do that look for the
Parameters rollout and set the Extrude
Amount to
0.1. That should do it, you will notice that you will get an inverted shape result in comparison to our previous shape. This happened because the deletion of the outer spline of the shape changed the outcome of the
Extrude Modifier to fill in the shape outline.

The coloration of the window pieces goes beyond the scope of this tutorial, but that should not be too hard for the intermediate user. You can move the glass window to the right place, convert it to a polygon or a mesh and texture them to the way you please.
