Strange body in certain model.
Are you writing an exporter to the Collada format? If so, I see a problem with the API design for the visibility of bodies that we need to correct soon. Other objects in the API have the correct design but somehow BRepBody was not done correctly. It should be that the isVisible property is a read-only property and indicates if the body is actually visible in the graphics window or not. Then there should also be an isLightBulbOn property that toggles the state of the light bulb next to the Body node in the browser. The problem is that the isVisible property is actually behaving like the isLightBulbOn. It changing the light bulb setting to indicate if that body should be displayed, but if light bulbs in any of it's parent nodes in the browser are off, which is the case here, the body isn't actually displayed even if it's light bulb is on.
I don't see a very good workaround because there can be multiple levels of nodes of different types that can control whether that body is actually visible or not. I'll push to get this fixed as soon as possible.
