Inverted normals?!

Shapeways says there's 'inverted normals' but in doesn't say where the problem areas are. How am I supposed to find them in Rhino? The model is fine in rhino.

maybe if you download Meshlab it shows you where the problem is

Hi MattBraun,

you can also sent your stl model to service(at)shapeways(dot)com so that we can take a look at it for you.

Cheers,

Ralph