Hello, dear SketchFab.
Its not so much SketchFab question, as 3ds max one.
I have that terrible seams in 3ds max model:
But in another applications there are some functions, that hide that seams, for example:
SketchFab has that function (Wrap T - Clamp):
Blender has that function (Extension type - Extend):
And what is the ANALOG in 3DS MAX?
In the name of science, i need the unswer)) Help me please, if you know!