Curb

Dear forum users,

I'm trying to break a relatively thin box with the “make breakable” function in the apprentice edition of Houdini 12. Sadly though, I am running into an issue (or limitation?)

The box stops breaking under a certain thinness. I've attached the project file. It contains an extruded grid (the box that needs to break), made breakable and a small box that's made static. If you play the simulation, the box doesn't break. However, if you dive inside the box and change the Z value of the polyextrude to 1.2 (that's .1 higher) and run the simulation again, it will break.

(a regular box and changing the height instead of a polyextrude gives the same result)

I thought it had something to do with the minimum volume within the fractureparms settings within the Autodopnetwork. However, I can change it as low and as high as I want, but nothing makes it break at a height that is lower than 1.2! Neither do any of the other settings, including density and impact radius.

I've also tried changing the minimum piece volume setting inside the fracture tab of the rigidbodysolver to no avail. It just refuses to break under that thickness! And it needs to be even thinner than 1.1!

I'm wondering if this is just a limitation of the solver, or if I am missing something, because I can imagine it not handling flat planes very well, but the box still has a reasonable depth.

Thanks in advance,
Curb