If I import a DWG file it loses several faces of the mesh

[Anonymous]

Hello guys! Here is my issue, I have this 3d chair in a DWG file, when I try to import it in Maya it gives me no problems and the result is smooth and sweet, but when I import it in 3ds it seems to leave a lot of faces open... guess that is a problem of setting the import parameters in the Import window when I select the file. Can you help me solve this problem? 

Thanks a lot,

Alberto

[rendermaster · Accepted solution]

in autocad, modify your Facetres and Viewres, then import it in 3ds max

[Anonymous]

Thanks for the reply Rendermaster!

I tried to do as you suggested by setting in AutoCAD Facetres to 10 and viewres to 20, but the result was the same, always missing faces.

So I used Meshrefine and MESHSMOOTHMORE, then imported it and the result was identical to your model, though the size of the 3ds file was 27 Mb compared to your 6 Mb file.

Do you know how can I lighten it? 

thanks,

Alberto

[rendermaster · Accepted solution]

this was my setting before importing to 3ds max. 

[leeminardi · Accepted solution]

The faces are there but some of them have their normals flipped.  Just select the blank faces and hit flip or use the Flip Normal Mode.  

Alternatively you could assign a double surface material and not worry about the normals but I think it would be better to fix the normals.

 

Here's the chair with wrong facing normals but with a double sided material (which is less efficient when rendering).