Ossein Lavallier:Skeletal Necklace
Created by Dan Greenberg USF SACD


This project was born of a desire to try my hand at modeling an object in 3D and then bring that object to life using a 3d printer. The Ossein Lavallier (Ossein meaning bone and Lavallier meaning necklace) is the result.

In the steps that follow, I will attempt to explain the creation of the 3D model in Rhino and the resulting physical object printed in 3D. It is my hope that after reading this, you too will be able to create something similar and of your own design.

If I had to guess, I'd say the model took around 8 hours to create in 3D, with a learning curve. The physical model took 15.5 hours in the printer. I am new to Rhino so I am sure that the 3D model could have been completed much more efficiently.

This tutorial assumes at least a beginner level of familiarity with 3D modeling and Rhino, with the user having played around with the basic commands. Prior to undertaking this project, I had used Rhino for roughly 6 hours, so something of this scale is certainly possible for a beginner. While this is my first actual Rhino model, I have previous 3D experience in Sketchup and older versions of Maya.


The screenshots have the command line in them at the top left of the image. You can look there for some more info on commands I am using. If you are attempting to model something like this, make good use of your SNAP, ORTHO, PLANAR, and OSNAP settings. I jumped back and forth through these, changing setting as needed. The tabs showing the settings for these tools can be seen at the bottom of each image.

The images tagged in each step are numbered on the lower right corner so you can follow along with the instructions.

When viewing the images tagged to each step, make note of the viewport so you do not get confused. Working in 3D is all about knowing what direction your looking in. I jump back and forth between wireframe and rendered viewports, as it useful to change the display setting of the viewport from time to time. Working in wireframe mode, switching to rendered, then to ghost, etc. helps you visualize the model better and you can see hidden flaws that may go otherwise unnoticed if you are working in just one mode all the time.


First, some curves need to be created. I started by obtaining some dimensions of the female neck and chest (Thank You Meagan) and used those measurements as a guideline while modeling.

I used “Curve: Interpolate Points” for my curves. These give a nice smooth line.

Using all 4 viewports, I drew the curve that will become the piece that wraps around the neck and shoulders. I'll call this piece the “collar or band”. The top viewport was my primary working port at this stage. IMAGE 1

Pressing F10 to bring up control points, I adjusted the curve in three dimensions. IMAGE 2

To visualize the 3D form, I used the “pipe” command and set my diameter to 3/8”. This creates a “polysurface”. Note: I then deleted the polysurface this command created, as I was just testing. IMAGE 3

In the top viewport, I select the curve and use the “mirror” command. Selecting the bottom point, I revolve the mirror 180 degrees to make two identical curves. IMAGES 4, 5

Next, using the “join” command, I created one curve from the two. Use OSNAP here. The curves need to be touching.IMAGE 6

I then smoothed out the curve by adding or deleting control points to avoid “pinches” like the one seen in IMAGE 7

I piped the top piece once satisfied and created three more sets of curves which will form “ribs”. These curves were created in the same manner, adjusting as I saw fit using all the viewports together. I wanted to have an organic feel to the pieces once piped, so I made the curves multidimensional. Note that I have now rotated the pieces so that it aligns correctly with the viewports. The front viewport now shows the front of the model, the side shows the side, etc. IMAGES 8, 9, 10, 11, 12, 13

It is important to continuously check all your ports for accuracy during this phase. Curves where then mirrored and joined. Note: I removed the piped polysurface yet again in order to have some clarity while I worked. I'll do this throughout and I'll try to note this so you don't get scared and confused.

Next, I created a line 5” long so I could make sure that I wasn't wildly out of scale. My referenced dimensions: Neck diameter assumed is 5”, length of the piece in the horizontal direction is about 5” and the vertical is also 5”. All seems to be good so far! IMAGE 14

In IMAGES 15, 16, 17 I created one last curve in the center that will form the “spine”. I then piped all the curves. I used a diameter of 3/8” IMAGE 18 shows all curves piped in “Rendered Mode”.

Upon close inspection of the model (In IMGAE 19), you can see that the piped curves aren't quite touching one another. This needs to be fixed. In addition, I need to add more definition to the pipes so it looks like what is in my mind. IMAGE 19 shows the close up of the front surface moving up and away from the 3 “ribs.”

<p>Very nice.</p><p>I wonder if this would be as easy to make in Fusion360 (e.g. cloud-based for realtime collaboration).</p>
can you post the resulting model file<br>thx
amzing job very ice
Thank you very much!

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