Alright, a little further testing today.
I uninstalled 3DCanvas Build 8.2, and reinstalled build 8.1.1.7, and 8.1.1.3 and their associated plug-ins. In both programs, I was unable to make even a small factory asset that did not disappear at certain angles.
Then, I downloaded 3DCanvas 7.1.1.2 and installed it, with no extras or plug-ins. I made a small (200x20x200) simple asset, textured it, and exported it. The only movement I made was to make sure that the center of the asset was at x0, y0. The object did not flicker or disappear in the sim. I then made an 1100x20x200 and a 1500x60x300 simple asset, textured and exported them to the sim. The assets are completely stable, with no flickering or vanishing up close or from afar, when looking in from any angle.
Now there are many variables to computers, and just the fact that I still had 3DC 8 installed on my computer could have influenced the outcome (although I did have 3DC7 installed into my User/Program folder instead of the normal c:\Program Files folder), and the fact that I did not have Decapods extras installed in 3DC-7, so I cannot definitively say that the Railworks exporter on version 8 is gimped. But at this point is is highly suspect of causing this problem and will be reported to Amabilis immediately, where it will be promptly ignored by their non-existent customer support. My suggestion is to used caution when upgrading to the newest version of this software.
