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Rendering Geometry Issues

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I've been having this problem for some time now and have gotten around it by tinkering with renderings in photoshop to get things right, but its just becoming too much of a hassle. Hopefully somebody can help me out with this:

I do a lot of 3D modeling, and use the 3D modeling tool sets as much as possible. In many cases, once I've created my geometries, they look just fine in wireframe and render perfectly in openGL, but appear to by a jumbled up mess of triangulated surfaces and polygons when i try rendering them with Final Quality or Custom RenderWorks.

I'm very diligent in ensuring that all my surfaces for extrusions are closed surfaces, and have even run a test render just using the sphere tool from the 3D modeling set and I still get this problem about 75% of the time - even if I try it in a new, blank file. Can anybody shed any light on this problem? Any help would be greatly appreciated!

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Could you add a signature showing your specs both VWs and Workstation to your posts under 'My Stuff'.

Perhaps you could attach one of your files that shows these issues and we'll have a look (go to Switch to Full Screen at the bottom for this).

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Ok, I've added a signature with my computer and VW specs. I've also added a VWX file containing some geometry where I'm getting this problem. You'll notice that the rounded caps to the vertical posts appear as if they're missing some elements of their geometry. This is only a small occurrence of this issue - I've had circumstances where this problem is quite obvious.

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Well I guess the geometry is simply to complicated, each individual extrusion has approx. 100 vertices x 23 objects = 2300 vertices, doesn't seem to be extreme though. Anyone?

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I didn't think it was too extreme either - And I've been getting that same problem with objects that have only 10 vertices; generated using simple tools from the 3D modeling set... Quite vexing, indeed.

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Here is also yet another model where I'm experience this problem - and each element within this model has well under 100 vertices; all the objects were generated from the 3D modeling tool set. Any ideas? Much appreciated!

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Ha! If only I had the spare change lying around for that... We just upgraded to 2011 earlier this year! Thanks anyway -- I'll keep trying to find a solution for 2011.

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It appears that you're not missing geometry the apparent jumbling in Renderworks is a result of different objects lying in the same plane.

Move the skirt for example 0.1mm off the block in CIS model and you'll see the issue is resolved.

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Is it possible that there is some self-intersecting geometry?

Just looking at the face and the skirt - changing all the vertices to corner makes it happy. Changing more vertices to bezier causes a self-intersecting geometry error.

I do a lot of similar work in 2011 and I've never seen this before... And like Vincent says, it works fine in 2012.

How did you generate the polys to make the extrudes? Are they imported from something else?

very strange.

mk

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I got the same for my VW 2011 with your magnifying glass, which is strange, because I have never seen it before. It even occured when I pasted one of the elements into a new document, which kinda scared me because it sort of felt like an infection. But when I started a new document to draw a similar object from scratch, everything looks normal again.

No help here i'm afraid...

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I have noticed when I pull the "discs/pulleys" away from their positions and then rotate them they seem to render OK. So it seems position has something to do with it?

I also used the push/pull tool to extend each outer face of the center "pulley" a goodly amount and then moved it around in space and it was like there was some invisible object sectioning the solid. If I moved it in direction A it would cut off a corner. If I moved it further it would cut more off and further yet it would return whole.

This is one bizarre corruption.

Maybe look into the history of your solid subtractions and maybe make the outer discs from an extruded ring rather than a subtracted solid?

Can't explain the arched extrusions either.

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I have the same problem with VW11. I have significant faceting of models imported from iges files and also from basic geometric shapes generated directly from the VW11 3D tool set.

Interestingly the models render fine in VW12.5 and Rhino

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