fracturing gound from underneath

[6ril]

Hi,

I'm trying to fracture a ground box, with growing towers from underneath it, pretty basic.

But I'm already stumbling on a few issues:

 

- can't seem to fracture (use shelf tool "make breakable") a large flat box (the ground). see frac_flat. hipnc

it works with box1 at size 2.5 0.1 2.5 but bigger size in x and z will prevent it from fracturing :/

 

- in this one it works with large ground because I clicked "RBD fracture object" and set it to packed. But how could I prevent the ground from rising (except the broken pieces) ? see frac_flat_packed.hipnc

can't constraint packed rbd :/

 

 

I'm probably not doing this the right way, so feel free to redirect me to any better solution

 

Thanks in advance.

frac_flat.hipnc

frac_flat_packed.hipnc

[6ril]

So,

for the sake of this thread, if another beginner like me stumble in here :

 

I figured out 2 facts that were giving me my pb:

 

- When working with packed RBD, the "make breakable" tool is not working. <-----*EDIT* with build 15.0.416 it's now working

 

- The ground was rising because my tower were in the same geo node -> the resulting collision geo was the convex hull of the 3 towers -> hence the rising ground.

I made a geo node for each tower and that solved the pb.

Edited May 6, 2016 by 6ril
new build (416)