Bump map issue

[fa2020]

Hi guys,
I wanna explain my problem directly. When I use bump maps, they lose the detail when the object is a bit far from the camera. For example, tire sidewall text has high detail when it's next to the camera but when I put the camera a bit far from the tire it loses the details and only large details are visible (of course with low quality). This problem doesn't exist in Keyshot. Is there any way to solve this issue? I put blur value to 0.01(the lowest value) but the problem exists.
For further explaination, I added some attachments as follow.

[romullus]

Try to lower bump map filtering if you haven't done so. Set it to 0,1 - 0,3, but don't get too low, as bump mapping needs some filtering in order to work correctly. Also changing filtering method from default to summed area may help here. Better yet, try CoronaBitmap instead of native bitmap loader, as former has superior filtering implemented.