Object Normals Issue

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I have a series of boxes setup in Houdini that I want to render, they were just polygons at first but when I rendered them, Mantra was smoothing the normals and it looked fairly bad (original.jpg). I then added a Vertex sop and turned on Cusp Normal, this gave me the look that I want to achieve (polygon_wCuspNormal.jpg).

Unfortunately I can not use polygons because I need to fracture these boxes and I need more subdivisions to do that. Switching to polygon mesh and increasing the subdivisions causes the normals to mess up again (polygonMesh_wCuspNormal.jpg). Does anyone have any ideas how to fix this?

Attachments:
polygonMesh_wCuspNormal.jpg (266.8 KB)
polygon_wCuspNormal.jpg (247.6 KB)
original.jpg (265.5 KB)

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please post up a very simple scene file of the problem.

Rob
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Here is a basic scene, got the same problem with just a single box.

Attachments:
normalIssue.hip (75.1 KB)

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Hi,
See attached for some options using the facet SOP. If you use the vertex sop and displacement in your shader you should look at this example. http://web.me.com/circusmonkey/circusmonkey/Shops.html [web.me.com]

of note > images in your post should be smaller > as it makes viewing your post awkward.

Rob

Attachments:
facetSOP.hip (210.5 KB)

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Looks like that solved the problem. Thanks for the help!
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