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Forums Maxon Cinema 4D How to make sure voronoi collision does not fracture the entire object?

  • How to make sure voronoi collision does not fracture the entire object?

     Hilary Tsai updated 1 month, 2 weeks ago 2 Members · 4 Posts
  • Hilary Tsai

    January 31, 2023 at 8:48 am

    I have a sphere which I’ve fractured using voronoi. I need the colliding object to crash through the sphere, breaking pieces horizontally (this part I know how to do) and making it explode out the other end, but not make the entire sphere explode. Think of something bursting through a planet but leaving most of the planet intact, if that makes sense. I heard that changing the collider object’s custom mass to a smaller value can achieve this, but it does not work in my case. Also, I’m not 100% sure if the colliding object is supposed to have a rigid body tag or a collision tag, but I’ve tried both. The same result keeps happening, with the entire sphere shattering. I’ve made sure the colliding object is small compared to the sphere, and increased the amount of points in the voronoi fracture to make sure the object does not disturb all of the pieces. Is this making sense? I’ve been struggling with this for a while and would really appreciate some advice.


  • Michael blaq

    January 31, 2023 at 10:42 pm
  • Hilary Tsai

    January 31, 2023 at 11:20 pm

    Yes indeed it is! Thank you, Michael!! Can you tell me what settings you used to achieve this effect? Many thanks!

    On looking further, it looks like you used a brush effect to select points–which I vaguely remember hearing about somewhere. I will try to look it up now. Thank you again!

  • Hilary Tsai

    February 1, 2023 at 12:54 am

    Hi again, Michael

    I just tried to follow a tutorial on weight brush and using the fixed connector, but I’ve been unable to replicate what you’ve done here. Would you be able to share with me how you achieved this?

    Thank you so much!

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