My illustrator 3D materials look different than the sbsar preview

[JulianTennyson]

When I download the "steel polished" sbsar file from adobe substance, it looks nice and polished, and occasionally it looks that way when I apply it to shapes in illustrator, but most of the time it's this weird grubby mess that intentionally has dirt and grime added. Any ideas why this would be happening? Thank you!

[Monika Gause]

Could be the lighting, the size of the objects (in proportion to the size of the material), the rendering settings.