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Mesh Faces that Intersect - How do I resolve these?

ZBrush Usage Questions
#1

Hi,

I’ve decimated one of my meshes and exported it to Rhino V5. Rhino is reporting that “12 pairs of mesh faces intersect”. This is causing me problems with Boolean operations.

I’m struggling to find any analysis tool in Rhino to show me exactly where the problem is. I’ve visually looked over my Z-brush model and inflated any areas that might have some intersection issues, but I have not entirely resolved the problem. Is there a way to identify or resolve problem areas within Z-Brush without the guess work?

My end goal is to Boolean several mesh parts together to prep the model for RP and silicone tooling (Resin).

Many thanks,

Hurricks

#2

I’m afraid I don’t know much about Rhino, which might be why you don’t have an answer yet… I did try and look up a help forum, but it’s pretty much a ghost town over there. http://www.rhino3dhelp.com/forum/index.php?board=2.0

I did find this though: http://www.uformia.no/support/tutorials/repair-invalid-mesh Looks extremely useful if you get it working!

#3

Thanks for the link!!

The geom is valid - reports as a “good mesh” but with intersecting faces (using repair mesh function in Rhino). This in itself isn’t classed as a problem except when you need to boolean the parts. There seems to be a lack of tools in Rhino to fix this issue or even highlight where the mesh faces are intersecting. If I can see where there is a problem I could smooth / inflate the problem areas.

Not sure if intersecting faces is a problem in other fields of digital sculpture?

#4

Have you tried turning dynamesh on and then off?

#5

Doug - you were spot on! Seems so simple now someone has pointed it out - Thank you very much :smiley:

#6

For anyone else with a similar problem:

I posed the question to Rhino support and had the following response:

“you can use testMSX to mark self-intersecting mesh faces with line segments. This is a test command, so it is not ‘full featured’, or finished, does not autocomplete on the command line, no documentation or support is available for it, but it can help in a pinch.”

However, when I tested the command it crashed Rhino. This is due to it being a ‘work in progess’. Anyhow, it may come in useful at some point.