View Full Version : LWCad 2 & LW9 ...

07-17-2006, 11:07 AM
Hi Guys,

I recently added LWCad 2 to my LW 9. Did some of the LWCad mansion tutorial. Have a look at these two pictures:



The first image is the model in Modeler, which looks fine. The second image is the same model in Layout. Note the missing geometry - and no the faces are not flipped the wrong way. The face around the windows on the first floor and the doors on the ground floor is ONE N Sided face.

You guys reckon this is an OGL issue? I have an older card at the mo. Nvidia with latest OGL drivers installed under XP Pro. I also use REALSOFT 3D and have Truespace installed - no OGL issues in these apps.

Any ideas? Appreciate ye're input.

And OH YES, i am a relatively new newbie when it comes to LW,


07-17-2006, 11:25 AM
Have you tried rendering the model in layout? If it renders then I would suspect an OGL problem. I no this sounds simple.......but that was my first reaction.

07-17-2006, 11:33 AM
Hi caddaraman,

I neglected to add that fact - yes all is fine when rendered. I used a tool in LWCad toolset called make Quad, this created a set of 4 sided polys out of the > 4 sided polys at the front - hey presto - no more missing faces. This leads me to think its not an OGL issue .. or is it?

LW9 supports ngons - I think. If so why do I need to quad the faces for Layout to display properly?


07-17-2006, 11:46 AM
It is indeed an OGL problem, LWCAD2 has a plugin which will clear this up by splicing N-Gons where it thinks they are logical so they display better.

The fact that it renders fine and looks ok in simple wireframe menas in has to be OGL. It isn't restricted to LWCAD or LW9, pretty much any 3d program has problems with this sort of thing.

07-17-2006, 11:48 AM
I have seen no such problems with Ngons in Layout. I'm using a quadro fx 2000 with the latest drivers. I would suggest it is either a hardware issue or driver issue that is causing the poly problems.

Try the Nvidia beta drivers from www.guru3d.com. They seem better than the official Nvidia ones!

07-19-2006, 11:34 AM
Hi Guys,

Steve, Colkai - I persisted. This is not an OGL issue. I upgraded to the latest nvidia drivers for the sake of it. But I have seen this in other apps. To resolve the issue I further subdivided the large front poly manually with the Drectangle Tool set to slice in LWCad 2. This resolved it. It would appear that LW9 can only handle a certain number of edges on an n-gon with respect to views in layout. Just a guess. If refined further the issue is solved.


07-19-2006, 11:35 AM
Here is a shot of added edges:


Further perpendicular edges added between the windows. With these edges solves, without you end up with missing polys in Layout.