Using the Fracture Modifier on a Sphere shows cracks and doesn't keep the sphere smooth?

[JTA]

You are using a community member build of the FM 2.8 development branch. It’s not supposed to work yet since we are still porting it over and waiting for 2.8 to stabilize and then after that the blender core devs need to add the new physics code.

Our team recommends until then you use our official 2.79b build which you can find on our official BA support thread.

https://blenderartists.org/t/custom-build-blender-fracture-modifier/

You can find more info on our 2.8 efforts in this post and other posts before it:

[Custom Build] Blender Fracture Modifier

We are working in the 2.8 code base already but there is a lot still to do since physics will not be updated in 2.8 until the second wave of 2.8 development later in 2019. Also it will take me a while to update the documentation. So like mcbeth’s investment in 2.79x Fracture Modifier is still a good way to go. FM 2.79x will be around for a couple more years at least since we have such a big user base. I’ve given more details in earlier posts if you scroll back. We’ll keep you updated. Unti…

JTa - Fracture Modifier team member
Fracture ON!