Destructible meshes created with PhysXLabs will not cast shadows

When importing destrucitble APB asset files from PhysX Labs there is no visible shadow cast for these meshes. The same is not true for a destructible created in UE4. These are using the default settings for the lights, with exception of possibly changing to dynamic only.

I tested this back to 4.0 and noticed the same behavior there as well.

Attached: image for comparison and PXL created asset.

1. Create a basic fracture asset in PhysX Labs or use the attached example
2. Open UE4
3. Import PXL asset
4. Place in scene with stationary or dynamic lighting

Expected: The imported asset from PXL will cast a shadow with default settings.

Results: Imported APB assets from PXL do not cast a shadow. When compared to a fracture mesh generated (using the same settings as PXL) will result in different results. The fracture mesh in UE4 will cast a shadow.

"Session Disconnected" UEFN

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any help with here I am using a relativly highpoly model with 4k displacement and still get this wagy edges