Teapot and UCX_Teapot being UCX_Teapot a sphere, I know its weird, but it was for testing.
Unfortunatly when I import the .fbx even if I uncheck “generate collisions” my collision is a reduced version of UCX_Teapot instead being the high res mesh.
That is wrong as far I know, Auto Generate Collision does exactly what it say, it creates automatically collision boxes for you, and if its unchecked, it will look for collision meshes in your file and if found, import them as collision. Have a look at the tutorial here:
Would like to get some clarification from someone more experienced or from Epic.