Today I just solved a bug in my game by making the line trace not hit the landscape at a 90° angle.
What was happening was that when I did a line trace at a perfect 90° angle (top to bottom) in between 25000 to 25500 on the y axis on the landscape it was simply not hitting the landscape !
Here is the landscape infos
The size of the landscape is 50500 and the bug was happening ONLY between 25000 and 25500 on the y axis and ONLY at a 90° angle.
It was doing it for every line trace nodes, even multi line trace.
Also, when I made the line trace end at z -10 (the landscape was flat at z 0) it was hitting at a 90° angle between 25000 and 25500 y. But there was HUGE areas on the rest of the landscape where it was NOT hitting now !
I believe it is a bug that come from the engine.
And I made some googling and this is not the first time someone complain about sometimes not being able to hit the landscape with a line trace.