Modeling Diving Knife Tutorial

In this tutorial you will learn how to model this cool looking diving knife. The model can be set apart into two pieces, blade and handle. Both having some nice features.


I really liked modeling this model, it turned out really good, and I must say that it was pretty easy to model it too. However, there is fairly enough playing with Osnap, but then again, when do we not use Osnap frequently? Anyway, to get you started, you first need to download some kind of blueprints I made for you out of this model. You just gotta love that Make2D command!!!

Blueprints reference

Blueprints reference


First things first, we need to setup our blueprints. Not only import them into Rhino, but also position and scale to fit the dimensions marked on them. First, go to Front viewport. You can expand it by double clicking it. Next, using command browse for blueprints you previously saved to your computer. Now, you don’t need to worry about how to position or how big you should make it. We will fix that in a bit, but just make sure your blueprints are not tilted. For that you can use Snap, or even better Ortho.

Create a line with PolyLine command or just simple command will do it. From the blueprints you see one dimension 145.08. That is just a reference dimension, and you can use 145. So, make a Line 145 units long and using Ortho make it horizontal. Now, the line will probably be bigger than the blueprint in PictureFrame, but that doesn’t matter because we will now scale the blueprint to fit the line. First, using command move the blueprints PictureFrame. Select PictureFrame, and start Move command, by clicking on the image, on the tip of the blade you define first point to move from. Then click on the End of the line for the point to move to. Using OSnap End option is smart thing here. Actually, without it you can’t do it accurately.

Move from blade tip

from blade tip

Next thing we need to do to the blueprint is to scale it. Now, we have one line that is 145 units long, and we see on the blueprint the length of the blade. Using command we will scale the by first clicking on the end of the line (or tip of the blade) and using Near OSnap option we will click on the line where the blade ends on the blueprint. Then, for the last click we will click on the opposite end of our 145units long line.

Scaled blueprints to fit the line length

Scaled blueprints to fit the line length

Create another Line, and position it according to the blueprint vertical line that represents the far right end of the blade.


Another line

Now, move the horizontal line to the Mid point of vertical line. Use Mid option in OSnap.



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16 Responses to “Modeling Diving Knife Tutorial”

  1. Brian Lake says:

    AWESOME tutorial! Haven’t seen any other tutorials with this much detail!

  2. Ivan says:

    thanks Brian, I appreciate it 😉

  3. Keke says:

    Looks a lot like Ragde’s diving knife.

  4. Ivan says:

    It is. If it is “his” design.
    I’m not really teaching design here, rather just modeling in Rhino.

  5. Robert says:

    What dimensions do you use and what version of rhino is this?

  6. Ivan says:

    I used centimeters, but those measures aren’t absolutely accurate, just a reference. Rhino version is v4.0 for all tutorials on this site.

  7. brad says:

    is it possible to use background bitmap instead of pictureframe? for some reason pictureframe just draws a frame and there is no image. do you know why?

  8. Ivan says:

    sure is. you can use background bitmap. As for the image not showing in pictureframe, search the forum, there have been couple of similar questions. I’d guess it might be problem with drivers. But than again, I might be wrong.

  9. Dioniso says:

    Excelent tutorial. Thank you!

  10. Gianluca says:

    Great tutorial but i have some trouble with the first sweep 2 rail for handle. i get some strange surface result. may i send you an image by email to check what is the problem?
    thanks in advance

  11. Ivan says:

    go to and open a new thread with your image attached.

  12. gnob says:

    first of all thank you for this awesome tutorial..,, second is to cast a newbie question.. how can I view the image after I make a picture frame?? it seems no bitmap image or jpeg Appeared after the operation…pls…help… if I’m going to use background image it will appear ,but if I;m going to use picture frame it won’t appear. only a rectangular line appeared….. as this tutorial instructed is much easy to use picture frame than background image….. pls…help….Much appriciated your help and respect..


  13. DeigoIce says:

    Just finished the model, looks a bit diferent, but i’ve learnd a lot of tecnichs, and a lot of stuff by myself, thnx rhinoh3d!

  14. Mila says:

    I havnt had Rhino3D for that long and I dont know how to get the image of the diving knife into Rhino3D like in Step 1 pic 1 plea help

  15. Mila says:

    nvm found out how

  16. shnh says:

    Excelent tutorial .thank you (:

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