Rendering is fine but mesh is empty

[ChikaYan]

Hi,

I tried to run HFS on some custom datasets generated using blender (same style as the synthetic dataset used by NeRF). Most of them worked properly, with only a scene appears to be very weird -- it has okay-ish coarse and fine rendering, but the normal rendering and mesh extracted are all just empty (see below)

Does it mean that the model failed to reconstruct the proper surface (probably because in this scene the objects are disconnected?) and models everything using the background model?

[yiqun-wang]

Hi, this issue should be that the surface has not been well reconstructed at the beginning