I FOUND THE SOURCE OF THE PROBLEM !
It' come from 3DS MAX,
if you DON'T ADD "NORMALIZE" UNIFY THE NORMALS TO YOUR 3D OBJECT
THE FBX CAN'T BE IMPORTED IN GG !!!
it's NOT THE NAME like i was thinking, i called my new object "sph" 3 letters and WITHOUT unify the normals the fbx doesnt work in gg !!!!
if i add the modifier "normal" and unify the normals it WORKS once imported to gg !!
that's the real source of the problem !!!
Maybe GG can normalize, unify the normals when the object is imported ???
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