[Bug][4.1] Fracturing a DestructibleMesh doesn't work on Mac OS X

Branch: Binary

Version: 4.1.0-2053896

I’m following this tutorial and I can’t seem to get my simple cube mesh to fracture at all: Unreal Engine 4 - Destructible Mesh Tutorial - YouTube

What I’ve done so far:

  1. I’ve created a DestructibleMesh based on my basic cube with a cube collision.
  2. In Default Destructible Parameters > Damage Parameters I’ve set the Impact Damage to 1.0 and the Default Impact Damage Depth to 1
  3. Pressing the “Fracture” button seems to do nothing to the mesh. I see two popups that disappear nearly instantly (Processing Sections/Processing Chunks), and sometimes the shading on the model seems to change slightly (some smoothing bug?). However, there are zero fractures.
  4. Increasing the Impact Damage and Default Impact Damage Depth also does nothing. Increasing the Explode Amount does nothing. Changing the # of Voronoi Cell Site Count does nothing.
  5. Preview Depth 0 is the only dropdown item that appears.

Thinking that my mesh might be buggy in some way, I repeated the process of turning a model into a DestructibleMesh with a prop that comes with UE4, the SM_CornerFrame. Same problem. No fractures.

I’m at a loss at what could be causing the issue. The process of making a DestructibleMesh and then changing quick two settings seems easy enough. Thanks in advance for any help.

System Specs

  • 15" Retina MacBook Pro (2012)
  • Nvidia GeForce GT 650M 1GB
  • 8 GB RAM
  • OS X 10.9.2

It looks like these people have the same problem: Why can't I make new destructible meshes in my custom project? - World Creation - Unreal Engine Forums

Solved in 4.4:

New: Mesh fracturing in Destructible Mesh editor works on Mac now.