Ok, so I’ve made some great progress since my last post. There’s one thing I’m rather confused about, though, and that’s dealing with lines (for the purposes of being rendered), as opposed to triangles and quads.

Using an SUGeometryInputRef doesn’t appear to work. For instance, take the following call:

```
SU_CHECK_RESULT( SUEntitiesFill(innerEntitiesRef, geomRef, true) );
```

(where `SU_CHECK_RESULT(...)`

asserts false if the returned `SUResult != SU_ERROR_NONE`

)

If geomRef contains faces whose SULoopInputRefs have only two vertices, the error reported is of SU_ERROR_INVALID_INPUT (enum entry 2).

So I decided to try a different approach, specifically for data which has only two verts per face:

```
std::vector<SUFaceRef> faces;
faces.resize(mesh->mNumFaces);
memset(&faces[0].ptr, 0, sizeof(faces[0]) * faces.size());
for (unsigned faceIndex = 0; faceIndex < mesh->mNumFaces; ++faceIndex)
{
SULoopInputRef loopIndex = SU_INVALID;
SU_CHECK_RESULT( SULoopInputCreate(&loopIndex) );
SU_CHECK_RESULT( SULoopInputAddVertexIndex(loopIndex, 0) );
SU_CHECK_RESULT( SULoopInputAddVertexIndex(loopIndex, 1) );
SUPoint3D faceVertices[2] =
{
vertices[mesh->mFaces[faceIndex].mIndices[0]],
vertices[mesh->mFaces[faceIndex].mIndices[1]]
};
SU_CHECK_RESULT( SUFaceCreate(&faces[faceIndex], faceVertices, &loopIndex) );
}
```

Which results in the same error code on the call to `SUFaceCreate(...)`

, stating that `loopIndex`

contains invalid data.

Thus, I’m at a bit of a loss as to how to do this. Any suggestions?