Hi there:
About 3D basic stuff.
on dat+gp4 environment, it would be possible add an object by selecting sector range, and this object would be positioned as fence builder does.
As Pitbuilding has exactly 33 sectors, so it would be an automatic command. Result would be 11 garages, with 3 surfaces as walls (side and back), one as roof and one as floor.
The same procedure to brake markers and S/F bridges or Grandstands, etc.
Every new 3d object would be created on a dat+gp4 environment, and all would be managed by dat file.
I´m sorry I can´t explain any better with this poor english.
@Enzojs: About DWF import/export with normals.
It´s possible on early Autocad version export a drawing as 3ds. From 2007 version to newer versions, it´s not possible anymore, but one can simply import Legacy Autocad drawings on a 3dsmax platform. I´ve been doing this since Dubai, sucessfully.
Cheers you all. I´ve out for sometime, but hopefully private business has turned my life easier now