I know it has to do with the portals and location marks interfering with renders or some
such thing but I would like more specifics instructions on the work around the
community has come up with.

Also, I remember reading a post a while back where someone claimed
to be able to side step this issue by disabling something
in one of the geck ini's


Thanks in advance for your help in this.

http://www.gamesas.com/index.php?/topic/1148040-how-to-fix-lighting-havok-and-rendering-issues/

It has been added to the very first post at the top of this page also. In how to install the GECK