I have imported a custom vehicle model from blender into my UE5.1 project.
So far, everything works great, except for the fact that the collision is very inconsistent.
I have noticed throughout my playtests that whenever I flip the car onto its roof or the car falls from a significant height onto the ground, it will clip through.
I have fully set up the collision and checked online for a solution for ages, yet here I am.
I believe maybe this has something to do with the game not checking for collision fast enough and misses the frame(s) where my vehicle makes contact with the ground.
Has anyone got any ideas on how I could fix this?
You can set the car collision to use ccd (continuous collision detection).
You can also try increasing the terrain thickness (its a parameter in the terrian if i remember correctly)
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Hey, thanks for the quick response!
I already had ccd enabled and it didn’t seem to help.
I just tried adjusting the collision thickness of the terrain/landscape and that also didn’t help much. I tried multiple values ranging from 16 to 1000 
Has anyone found a fix for this issue yet? I too have imported a car from blender and everything works well most of the time, but dropping it from certain heights or high velocities causes it to fall directly through the ground. The collision is set to CCD (which is the standard for the Vehicle Adv Pawn), but that doesn’t seem to affect it at all. Looks like I’m in the exact same spot as the original poster.