If you experienced disappearing traffic in FSX:SE – I have an easy fix for you! SmallPartRejectRadius will prevent planes vanishing and popping in 0.3-0.5 mile distance.
FSX tweak / fix guide
Effect on performance: minimal
Good for: all users of FSX Steam Edition
Disappearing planes – the problem
When I moved “full time” to FSX Steam I noticed that some objects (mostly planes but also some boats) are disappearing or popping out in small distance. It did not bother me until I flew online with a friend. It was really annoying when I lost sight of him while he was flying just 0.3 mile in front of me (I checked his position and distance using FSX traffic labels). We discussed the problem and thought about a tweak that was used in a completely different purpose but had a similar effect.
How it looks in fsx.cfg:
SmallPartRejectRadius tweak allows you to improve performance slightly by removing the smallest objects you see. Turn it to 2 and it will eliminate all objects smaller than 2 pixels (after some tests – I think it means “if a width or height is equal or smaller than”). 4 will take away even larger objects and 8 will kill some pretty large stuff (and causes unpleasant popping – when objects finally appear).
It seams that FSX:SE use a default setting of “2”. It’s different than in legacy FSX that defaulted to “0”. That is why some objects disappear in FSX:SE.
What you need to do? Add the SmallPartRejectRadius=0 to [SCENERY] section of your fsx.cfg file.
If you are not sure where your fsx.cfg file is – read my note on fsx.cfg location.
Who should use this tweak?
I think it’s good for all users who have a medium or high-end PC.
Users of lo-end PCs who do not fly online may consider keeping the default value or playing with values between 2 and 8 (I suggest using 2 and 4).