Help Ive got flying tree's.

What I'm getting is that your flying along and you see a tree.

Does this happen at any altitude.

I suggest reinstalling FSX 😀

Sounds like a challenge 😀
Same sort of thing here (second pic)
https://forum.flyawaysimulation.com/forum/topic/32681/odds/

I was flying the mission to get the coworker, I noticed when flying to the air strip over the mountains my plane was very erratic,

When I arrived at the air strip Trees were in the sky, I could fly straight though them ?

My install of FSX is more than a year old and I get flying houses occasionaly, and yes I can fly throught them.

Also The cub gets jumbled up once in a while, switching between virtual and 3-D cockpits.

My computer is strong enough for FSX on Xp with 4gb of ram. This stuff happens after FSX has been running for more than an hour or so.

I can fix it in game by changing to windowed mode, then returning to full screen.

oldsamer wrote:

My install of FSX is more than a year old and I get flying houses occasionaly, and yes I can fly throught them.

Also The cub gets jumbled up once in a while, switching between virtual and 3-D cockpits.

My computer is strong enough for FSX on Xp with 4gb of ram. This stuff happens after FSX has been running for more than an hour or so.

I can fix it in game by changing to windowed mode, then returning to full screen.

If yours runs for an hour then has problems the chances are that the computer need to be cleaned of all dust.
Open the case, using compressed air (can) (don't point it down just straight) use it to blow all dust out.
Put a wood (chop stick) or plastic stick in the fan so it doesn't spin and use the air to clean it.
Do this on the heatsink fan, and the cards fan. Also do the power supply.
Don't touch anything in the machine unless you either ground yourself (touch the p/s) or use a static wrist strap ($5).
Put an extra fan on the rear grid of the computer and blow out ($20).

Easy and cheap.