How/Why do certain objects render correctly in the ShapeNet Viewer but not in Blender?

[airalcorn2]

As discussed on the ShapeNet forums, some objects do not render correctly in Blender. For example, the object found at ShapeNetCore/02958343/114b662c64caba81bb07f8c2248e54bc (a "NYPD Highway Patrol Dodge Charger") looks like this in Blender:

but, in the ShapeNet viewer, it looks like this:

As was mentioned in the forum post, the models that do not render properly in Blender seem to have a "bad topology", e.g., they include "two-sided" faces and "flipped" faces (as mentioned in the ShapeNet Mitsuba fork). So, my question is, HOW does the ShapeNet Viewer/jMonkeyEngine properly render these objects? I would like to be able to replicate its process so that I can use the models with my own rendering framework.

[airalcorn2]

It looks like I fixed the issue by adding back-face culling. Here is the car with back-face culling off:

and with back-face culling on:

It still looks weird in Blender, though:

.

Here is model ShapeNetCore/02958343/8577f3f82d5ce3ecc2fe329dd557eb52 with back-face culling off:

and with back-face culling on:

[YuDeng]

@airalcorn2. Hi, I wonder if you have figured out how to render those shapes correctly using Blender? I encounter with the same issue but don't know how to solve it. I only have little experience about Blender.

[airalcorn2]

@YuDeng - I did not, sorry.