long extrusions import issue

[PhilippeV8]

I'm still on 4.2.35 .. if going to 4.3 solves this, let me know, I'll upgrade as soon as I can ..

Other (smaller) parts import just fine.  It's the long aluminium extruded profiles it's got issues with when importing from Inventor (2014).

No matter what tesselation I set on import, doesn't help any.

[Chad Holton]

Hey Philippe,

Would you care to share that inventor file (or any other with the same exact issue)? If so, please send to support@luxion.com

Thanks,
Chad

[edwardo]

Newer versions of rhino do this with extrusions, it's annoying. Iv found if I explode the surfaces on extrusion geometry it imports ok.

Worth a try?

[PhilippeV8]

Explode surfaces ... don't think I can in Inventor .. or upon import to KS.

Ow, thnx for moving this to the right thread mods!  Sorry 'bout that...

[br3ttman]

Are you able to adjust the part tolerance or part accuracy in Inventor prior to exporting?  In ProE for example, especially on smaller parts, but also large parts with fine details, I'll adjust the part to a finer accuracy prior to export, whether to an .stl file or KeyShot, and I'll get more triangles with better definition on the smaller details.

[PhilippeV8]

I believe level of detail is not in the inventor file.  If you open up a big assembly, it can happen that the LOD of small parts is not very acurate, but the more you zoom in on them, the better LOD they get.  So it's while working on the fly that the visual LOD gets finer .. however, I do not believe it is saved in the file.  It's probably more like a vector data file.

I can probably try to work around this by installing KS3 and importing there and then taking it to KS4 ..  I did recently switch Inventor to v2014 and KS4 to a more recent version, so it's hard to tell which of the both is causing the issue now ..

Either way, I'll pass a file to luxion on monday for them to test on.

[PhilippeV8]

I tried importing some old long extruded parts in KS4 and they come in with no problem.

So either it's down to an Inventor 2014 setting, or it might still be an import issue of the new Inventor file format.

[PhilippeV8]

Can not import any of the Inventor 2014 parts in KS3.3.33 so that's no work-round...

Export in Inventor to STEP doesn't help either.
Dito with IGES.
I can however save IGES as faces, but it still loses some triangles when importing.  Also with IGES I lose all file structure.

I can take the IGES into 3DVia and save as 3DS from there, which gives me a good result, but also loses the file structure ... but for now I'll take that and continue with my rendering.

[Robb63]

Newer versions of rhino do this with extrusions, it's annoying. Iv found if I explode the surfaces on extrusion geometry it imports ok.

Worth a try?

Hi Edwardo, this can be switched off in Rhino so that it doesn't happen anymore (unless you turn the feature back on). It used to drive me crazy if I forgot to explode the extrusion.

[Ruckus]

I know you said you tried different tolerance settings for the tessellation - but did you look specifically at edge length?  It is usually an irrelevant setting but for something like this, triangle edges running the full length could cause problems.  (If the the edge length is unset, or is set to 0 that could mean infinite lenght.)

[PhilippeV8]

I've got no such import options to KS .. just "Tessellation Quality"

[Ruckus]

Ah, sorry - I do all of my tessellation in the CAD application.  There is usually more control over the tessellation settings in those programs.

[PhilippeV8]

Upgrade to KS 431 doesn't help.