3D point cloud quality drop

[soposhankulashvili]

Hello! Thanks for your amazing work.
I have noticed that the quality of 3D point cloud is significantly lower than the rendered images produced after training (this issue is also present in previous InstantSplat repository), instead of smooth surfaces there are noticeable holes between Gaussians, as a 3D viewer I used SuperSplat, MetalSplatter (issue is noticeable in both of them).
Is it planned to refine the produced .ply point cloud file? Is there any alternative to visualize the InstantSplat reconstruction in 3D?

[SingleBicycle]

Hi, thank you for the kind words and for reporting this.

What you are seeing mainly comes from how the current representation is defined and exported. The .ply stores the learned Gaussian primitives used by the renderer, rather than a refined surface mesh or a surface-oriented final point cloud. Since the optimization primarily targets rendering quality, external 3D viewers can expose gaps between Gaussians that are much less noticeable in the rendered results.

At the moment, we do not yet provide a dedicated refinement stage for surface-friendly export. So for now, the most faithful way to inspect the reconstruction is still through the renderer / Gaussian visualization pipeline, while external viewers are better suited for qualitative inspection.

We are actively investigating this and plan to improve both the geometry quality and the export/visualization path in future updates. Thanks again for pointing this out.