OBJ import error, help!

[bobu]

I try the script OBJImporters.rb to import a model from Zbrush.
And here it is...

is that because the model is not triangles mesh? Or anything else? Please help me to fix it...,thanks

---

OBJimporterror.skp

[remus]

Could you post a bigger pic please? its quite hard to see whats going on.

[matteo]

bobu,

what is the scale of your model? How big is it?
When you import a model from another program you can import meters instead millimeters if you don't specify it. The result is a mesh reduced to a lilliputian scale.
Sketchup is not able to close tiny polygons with a face.

I believe the problem here is about the polygonal structure. The faces of your model seem to be quadrangular. The obj format supports quadrangular faces with non-coplanar edges, while Sketchup requires coplanar edges to close a face. Then, where the edges are not coplanar, a face is not created.

You can try to triangulate your model before exporting it, or export it as 3ds model and it will be automatically triangulated.

Sadly, this increases the number of polygons of your model, at least by two: your cpu and gpu will not like this.

Let me knoe if that helps you.
/matteo

[bobu]

Thanks matteo, I found that the problem is about the polygonal structure. But Zbrush suports only OBJ exported. So that if I want to import model into SU, I must use the 3rd app to convert it from OBJ to 3ds(!!!). Hope the OBJImporter ruby make an options for checking the polyonal structure before put this thing into Sketchup.

[matteo]

hi bobu,

the OBJImporter.rb plugin doesn't work always well with such models (besides that it takes a long time to convert the model)

I'd suggest to use Wings 3d, which is opensource and free to make the conversion. It has always worked well for me.

Wings 3D

(www.wings3d.com)

/matteo