Back in February I posted a few questions in a message titled

"collision, polygon transparent, mdl to map"

I never received any responses to my questions but the Collision and Mdl to Map problems have been taken care of. The one remaining problem of disappearing (Transparent) polygons or triangles still remains. Please refer to the link below to read my previous post so that I do not have to take up more space in repeating a post.
http://www.conitec.org/ubb/Forum1/HTML/001597.html

this time I have posted two pictures of the problem at the following links:
http://home.earthlink.net/~ronholmes/16160.jpg
http://home.earthlink.net/~ronholmes/31160.jpg

This problem also appears if I bring this model into the Office Level so I am sure it is something about this model and another that I made. The other model was just a square box with the entire model at 256 X 256 pixels. So it is either something in common with both models or there is something in A4 version 4.23 that is causing it.

I have worked on this problem for more than two months without any success in resolving it and I have no more ideas on how to remedy the situation.

Thank you for any help anyone can give.

Ron