Collision issues with imported model

[cultofbyron]

So I'm having a few issues with one particularly stubborn bridge model that I'm attempting to use.

https://farm6.staticflickr.com/5615/15307264110_3da5c4002f_o.png

My process is:

1. Import model into 3ds Max 2009 using Gildor's ActorX importer script.

2. Correct textures.

3. Import collision mesh into 3ds Max using .x file importer.

4. Use nifprops to set collision, material to appropriate, mass to 0.0 (default 1000 causes 3ds to crash on export.)

5. Export whole scene as Oblivion .nif

6. Correct textures again in NifSkope, which defaults to my Morrowind textures folder every time for some reason.

7. Place in landscape in Construction Set.

So far I've been able to convert it from a .pskx to a .nif so that it appears fine in game, yet for some reason it never has any collision.

Other objects converted and placed in the landscape using the above process are fine; trees, walls, fences and gates. But this one bridge model fails to fulfil it's primary function and as a novice at all this I'm finding it hard to see why.

I have been also encountering a game-killing freeze whenever I enter a cell with a large number of wall meshes with collision so I'm wondering whether my basic method for adding collision is flawed. - Edit 2: This was one of the town wall meshes causing Construction Set to crash - now fixed.

Any help with this would be much appreciated!

https://www.dropbox.com/s/o0r6i4ywz8p4sgz/BSBridgeAnnivC.nif?dl=0

Edited October 18, 2014 by cultofbyron

[JDGameArt]

Have you tried ChunkMerge?

 

http://niftools.sourceforge.net/wiki/Skyrim/Adding_Collision_Mesh_using_ChunkMerge