[SOLVED] How to FORCE using original mesh as complex collision?

[hardway]

I have long road mesh. Unreal Engine not use it as complex mesh. It generate low poly version of mesh.
Yellow - original mesh
Blue - collision mesh.

Triangles count - 2653
Area of road - 142354 x 82270 x 6333 cm

How to force Unreal Engine use complex mesh for collision?

[hardway]

Solved.
I change Nanite settings “Fallback target” and all work now!