Acad to Max triangulation probs

[juanpch]

Hi all,

 

I have this problem when importing Acad geometry to Max. As you can see in the image I applied a normal water architectural material in max and it reveals all the triangles in the geometry (I need that volume to be tansparent as it is water and a lot of elements goes into it) and I need it flat and clean as it is in Acad.

 

I have try changing to very diff. settings in the import dialogue in Max and nothing goes better.

 

I hove no more ideas by now and will be helpful some advices!

 

Thank you all.

 

 

j

[dande]

I have had similar problems. I found sometimes when you apply a material and do a render it's fine. When that doesn't work I redraw the offending object in Max. Make sure your site is on 0,0 in AutoCAD before importing. If your AutoCAD model is too far from 0,0 when imported into max this can cause strange behaviour

[juanpch]

Hi dande,

 

Thank you for your post, but I have already all the geometry in 0,0,0.

 

I have found a solution that seems to work. The problem was that acad make solids and max does not understand solids, in max everything are meshes (therefore triangles).

 

And this tesselation appears only with transparents materials that reveals the geometry, with opaques maps and materials there is no probs.

 

The solution implied a bit of wirk but at least is looking fine, I redraw the polyline in acad and instead of exporting a solid I just export the line and then extrude with the max extruder as a mesh and it caps the botton and the top correctly.

 

I will have to find out if extruding a polyline with holes inside (as is my need because a lot of objects goes underwater and I was using boleans to extract those) look as good as this plain one.

 

Thank you and regards.

 

 

j

[postite]

Hi,

 

I usually use spline "region" in AutoCAD. It's extremely useful!!

 

It's a kind of hatch. So it's in 2d but once in your 3d soft, it forms a proper mesh that can be easily extruded.

 

Info here:

http://www.cadtutor.net/tutorials/autocad/drawing-objects.php#Region

 

Hope it helps

Edited November 29, 2010 by postite

[Nic H]

why dont you just put a box in teh scene for teh water that goes through / under everything?

much simpler - you dont need the extra faces.

[juanpch]

Hi!

 

Thank you postite and nicnic for your comments.

 

Postite: I haven't think in the reg option and certainly is a good way to solved this. Thank you for the advice and I will be cheking it ))) (I guess that converting the polyline to a reg in acad is a step forward before going into max).

 

nicnic: It's true that thinking simple solutions used to be the correct one's but in this very specific case I have three water levels (swimmingpools, lakes and rivers) and all of them have a very tricky geometry on it's borders so the box solution wasn't avalible for me this time, but as I have said, thank you for remember to go simple first )))

 

regards,

 

 

j