How to Make a Hand Grenade – Part 2 of 2

Discover how to make an object explode using the particle simulator.

Length:
38 minutes
Software:
Blender 2.57
Difficulty:
Intermediate
Rate:
VN:F [1.9.22_1171]
Rating: 4.7/5 (105 votes cast)

In Part 2 you will discover how to:

  • Use the Explode modifier
  • Use the Fracture add-on
  • Create a glowing explosion

Watch Part 1

Finished Result

Check out this reference video to see how a real grenade explodes. As illustrated in that 2 second video, you can see the shell is literally obliterated into thousands of tiny shards.

That’s what we’re trying imitate.

Here’s a little bonus animation that I created:

At a Glance

Screenshots from the video:

Further Inspiration

Here’s three links to some more grenade inspiration:

How to Make a Hand Grenade – Part 2 of 2, 4.7 out of 5 based on 105 ratings

About Andrew Price

User of Blender for 9+ years. I've written tutorials for 3d World Magazine and spoken at three Blender conferences. My goal is to help artists get employed in the industry by making training accessible and easy to understand. I'm an Aussie and I live in South Korea ;)
  • Al Khatib Nader

    Airsoft Torunament teaser…

    http://www.youtube.com/watch?v=6rfSJWulsgI

  • aoxsic

    I didn’t do so well. I exaggerated the motion blur but didn’t see that until after render. Then the background looks very low res. And then the motion path looks unnatural. And also I forgot to close the hole on the bottom of the grenade. And also the same frame on which the explosion starts should be the frame on which the handle flies off, but it isn’t.

    So, all in all, I messed up. Here’s a movie of how much:

    https://www.dropbox.com/s/zn8h80rm3gia29t/0001-0031.avi

  • WhovianDood2760

    Great tutorial, really helped me with making explosions:) Keep it up!

  • JEGHC

    Great Tutorial. Keep up the good work. :D

    Just a thought, but if anyone has any issues with the fracture add-on you can now also break up the fragments with the new cell fracture add-on. All you need to do is mark the cube with random dots using grease pencil and then make sure that you select grease pencil as the point source. Works a treat and allows you to set an interior material like with the solidify modifier. The benefit of this is that it also calculates relative mass for each segment. I also recommend increasing recursion when doing this.

  • John_234

    This is just a mild realism issue, but on hand grenades the spoon flies off the moment the pin is pulled. So it wouldn’t stay attached like that.

    Also, the Mk2 specifically gouts a stream of smoke before it explodes.

  • jairo mc

    show blender o futuro !!!!

  • Jeroen

    Great tut.

    However… a real grenade -of this type- doesn’t work this way and could never detonate with the handle still attached.
    One holds the grenade firmly, making sure to squeeze the thing, keeping the handle in place. You then pull out the safety-ring and the grenade is ready to be thrown.
    After release, a tiny spring will then EJECT the handle, thus passing the point of “no return”.
    Once a grenade of this type is thrown, its handle isn’t there anymore, nor is it possible (as I’ve seen in several movies) to pick it up and re-insert the safety-pin.

    That’s all. Like I said… great tut.

  • http://www.youtube.com/watch?v=1M5EK-awbBw Leon

    Pls Check my Intro Made in Blende and Sony Vegas pro 10 ttp://www.youtube.com/watch?v=sCJ185jx11w

  • craig

    Hey Man.

    Great tut, thanks for that. Any chance on a further explanation to how you put together the slow motion part at the end.

    :)

  • Raphael

    For some reason, my shrapnel are emitted in the same way they should be, but offset a bit to the right, so it seems that a second, invisible grenade is exploding along with the main one. Does anyone know how to fix this?

    Thanks!

  • Josemaria RRA

    You have really cool tutorials!

    USEFUL TIP ON GRAPH EDITOR:

    If on the side, where you have the name of the graphs, you select one graph, keep the mouse over it and press V, all other graphs disappear from the graph viewer window. It’s useful for the situation you had where you were selecting other graphs by mistake.

    You probably knew that, but hey … :p

  • Chris

    My final product part 2, this time I used the compositor to make the explosion look at litte more realistic.. http://www.pbase.com/c_opall/image/138843780

  • Robin

    Hi Andrew,

    I want to use the explode for a other purpose.
    But how do i make a other object interact with them.
    So that they bounce of when they touch?

    • Raphael

      I think if you select the object you want the shards bounce off of, and under “physics” you turn on “Collision”, the particles will bounce off of the object.

      (Although I’m not sure if it calculates the physics for just the particles or the actual shapes of the shards)

  • Jesse

    Could you use Blender’s Radiosity feature for lighting the fire? I was confused as to why you were using individual lamp-particles in order to make the fire cast light.

  • Keks3000

    The vector blur note doesnt work in my scene…
    Andrew, how to fix that? :P / :D