Hi Norm and Jeff, thanks for your help.
I am using P3D V5.2 HF1, all up to date
I do NOT own the payware PAKT. It is stock P3D scenery. As for the'tunnel", I wondered what that is and in fact have noticed it in one or two other scenery locations...sorry, cannot recall which ones at the moment.,
Specifically, I installed TFX using Poppet's method. My terrain.cfg is correct.
I have placed TFX in the correct higher over lower order. The two files are in correct position in re ORBX scenery files.
All THE RTMM files are above TFX as well as the one or two other add on sceneries which I use in P3D. I install sceneries using the Lorby Add on Utility. I have set positions in re ORBX, using ORBX Central, so that ORBX files begin after my add ons, and are above ORBX AIRPORTS AND REGIONS, the default setting.
Finally, as for the exact RTMM matching files, which ones should I look for, and where.
I should add that TFX is installed within P3D, and there is also a reference under documents, P3D ADD ONS. Those entries are all xml files.
Again, thanks for taking your time to help me. I have been simming since the mid 1980s, beginning with a Commodore 64. While not exactly a rookie, there are some issues that do creep up from time to time and seem above my paygrade...this is one of them.
Sherm