I have created destructible meshes without issue before, but it seems almost at random that the mesh will decide whether to create end cap triangles or not after fracture mesh is applied.
Anything I am missing?
https://forums.unrealengine.com/attachment.php?attachmentid=32012&d=1427340845
Hi Osok,
Unfortunately, this isn’t a bug with the fracture tool. This is an artifact of not having a mesh that is closed.
The PhysXLabs Documentation on NVIDIA’s site will cover this in the Authoring with PhysXLab in the How to Prep Your Mesh for Destruction section.
Holes like this can happen because of a couple of reasons:
I hope this helps!
Tim
Hello Tim.
Thank you for answering. I did have some screw models that had one face deleted to save tris, closing this solved the issue for some assets.
I am importing a two object sign. If I import only the post it fractures perfectly. If I import only the sign it fractures perfectly. If I select both of them (export) and combine meshes on import I then get the issue of open ends on fracture.
Blender 2.72 (tried both 6.1 and 7.4 fbx exporters)
Here it is once I create a destructible mesh.
I think this in lies the problem. Or something. I don’t really know. Almost seems like normals get flipped when a destructible mesh is created.
You need a fully closed mesh. All sub-objects need to be modeled into a single object otherwise things like this will happen.
Sign up for PhysXLabs for free and download here: https://developer.nvidia.com/apex-destruction-physxlab-tutorials
When you open PhysXLabs go to menu > Help > PhysXLabs Help > then in the left panel select the tab for “Destruction Authoring with PhysXLabs.” > then the section labeled “How to Prep Your Mesh for Destruction” will give you all the ins and outs of making destructibles.
The holes in the destructible is one of the main topics covered:
Thank you Tim.
The issue was the two objects overlapping each other slightly.
I appreciate your patience and help in solving this issue.
