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Destructible mesh not assign internal material.

alt text

In 4.17 destructible mesh works fine, in 4.20 there are huge problems.

Assign the Materials 1 material doesn't work.

Assign the Materials 1 material and press Fracture Mesh reset the material slot.

Import chunks don't import Materials 1 proprerly.

Is planned a fix soon or some workaround exists?

Product Version: UE 4.20
bug.png (265.3 kB)
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asked Nov 03 '18 at 06:06 AM in Using UE4

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It was broken by some changes since 4.18 . My quick fix for this is adding this line to DestructibleFractureSettings.cpp ( if you use C++ version of the Engine, the file should be inside UnrealEngine\Engine\Plugins\Runtime\ApexDestruction\Source\ApexDestruction\Private :

         FCStringAnsi::Strncpy(SubmeshData.mMaterialName, "InteriorMaterial", nvidia::apex::ExplicitSubmeshData::MaterialNameBufferSize);

to this block of code : ..

     // For now just copy the submesh data from the 0 submesh.
         apex::ExplicitSubmeshData SubmeshData;
         apex::ExplicitSubmeshData* SourceSubmeshData = HMesh.submeshData(0);
         if (SourceSubmeshData != NULL)
             SubmeshData = *SourceSubmeshData;

         FCStringAnsi::Strncpy(SubmeshData.mMaterialName, "InteriorMaterial", nvidia::apex::ExplicitSubmeshData::MaterialNameBufferSize);

         // BRG - this is being done until I add the ability to reset the submesh data without resetting the mesh data in the fracture tools
         if (HMesh.submeshCount() > (uint32)OriginalSubmeshCount)


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answered Jan 12 '19 at 03:17 PM

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avatar image donzen Jan 13 '19 at 08:54 AM

Fixed, thanks dude! :D

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