Hi Damian,I think I've uncovered a bit of a bug in wxRE here. It's happened on a couple of flights now, and this time is was very repeatable. I'm not sure I've narrowed it down entirely, but I'm working on it.The symptom is that the ground totally disappears and is replaced by a solid blue colour, as though one is flying over open water from horizon to horizon. Below is a pic showing what is happening:http://www3.sympatico.ca/g.davy/WXRE/wxRE01.jpgI took a screenshot of the Status screen once this started occurring:http://www3.sympatico.ca/g.davy/WXRE/wxRE02a.jpgOK, it seems to happen first after at least 1.5 hours in the air. I've not seen it happen while I've been below the clouds, but I rarely fly that long below clouds anyway. It always seems to happen with an undercast. I haven't seen it occur with broken or less coverage clouds. I did some experimentation since this was a 6 hour flight, and here's what I was able to come up with:The pic above was taken over northern Manitoba, Canada, where it is mostly land surface (lots of lakes, but nothing large). I was using the ONLINE option in all cases. The first thing I did was slew down to the ground. The top of the cloud base suddenly became visible and I did "find the ground" although it was in a fog at first. When I slewed back up the first time, it went back to the blue undercast. I repeated this and then came through the bottom of the cloud to the ground. Upon slewing back up again, the clouds below stayed this time and all was normal for another 10 minutes or so. Then the problem reoccurred.Next, I paused the sim, removed the "Reduced Visibility with overcast" option, then closed AS, cleared all weather from FS, unpaused FS to give the wx a chance to reset, then paused it again and rebooted AS. I then started flying from where I paused the sim. The situation reoccurred very soon after I unpaused the sim.Then I again went through the process above, only re-added the Reduced Visibility with overcast option again, but removed the Reduced Visibility in Rain option. After doing the shutdown and restart of AS, again the problem persisted after a few minutes of flying.Next I closed AS once again, cleared all weather, and started FSMeteo. I ran fine with it for about a half hour, always on top of an overcast. It was giving me the same reports as AS was, so I know the wx conditions were the constant in the tests.I then closed FSMeteo, cleared all FS wx again, and restarted AS as before. Again the problem came back, almost immediately. Thinking there might be a conflict setting with FSUIPC somewhere, I tried various settings in there, including applying then removing the Fix Everlasting Rain, Attempt to Fix Whiteout, and Reduced Visibility in Rain (in FSUIPC). None of these had any effect.HOWEVER, the last thing I tried was applying the "Prevent External Control" option in FSUIPC. That had an immediate effect, yet I still had the undercast beneath me. The ground returned as per normal. I deselected it once again to see if the problem would return, but in the remaining 3/4 hour of the flight, mostly with an undercast (but now with mountains poking up through), the problem didn't return again. There may be a clue there.I am using FSUIPC V2.95, have a 2.26 GHz PIV with 512 DDR RAM, an MSI GForce IV TI4400 video and SBLive sound card. FS is FS2002. Other programs running at the time were Real Time and FSScreen. Antivirus was disabled and no other programs were running in the background.Because of the repeatability of this bug and only with AS running online (I don't know about offline yet), I feel confident that it is something in AS, but exactly what I'm not sure. It seems that you have to run it at least 1.5 hours for it to happen the first time, but once it has occurred, it starts to repeat on a fairly frequent basis. Hopefully someone else can make this issue occur (someone reported AI aircraft textures going missing, and this may be related somehow) and can make note of the wx conditions and options selected. If you need any further info on the situation, I did keep notes as I was experimenting.Thanks Damian, hopefully you can find this one. It's a bit obscure, but for those of us who do long flights, it could certainly be an issue. Appreciate your comments.Best,GlennPS - I have tried reducing the size of the images above, but nothing I do seems to have an effect - sorry for using so much bandwidth

Hello, It's the V-Sky (114kb), download the (disabling V-Sky) files from the link below and copy the texture in your fs2002texture.Disabling V-Skyhttp://fsw.simflight.com/FSkySe.htmlEric

Thank you Eric! I wonder why one needs that when the V-Sky option is not selected in FSSE or in FSUIPC? Obviously if FS Skyworld has a "disable V-Sky" file, then it must be the source of the problem, but I never thought of that one.Thanks VERY much for this! This one really had me puzzled :-). Appreciate the help.Glenn

Yup, that was it apparently. Thanks once again Eric, appreciate your feedback on this. What had me not looking at this to be the culprit is that V-Sky is not checked in FSUIPC, so I never even thought of it. However, I DID replace the cirrus clouds from FSSE, and I guess that was enough to do it. The 4 hour flight this morning with lots of undercast was almost flawless, and none of the problem I mentioned above showed once. So, all is good now.Thanks much Eric.Glenn