Grey glow on voxel 3D model

Hello. I have 3D voxel model and i have a problem. The object has some sort of grey glow. Also in scene view, if i will move back camera, i will get the same effect. How to avoid it?

Pics:

https://ibb.co/mqLSwF

https://ibb.co/hDWBOv

https://ibb.co/i1MZbF

https://ibb.co/dd3Qiv

It’s probably a mesh or material problem.

Does it appear with the default material? Check your export settings to make sure the faces of your squares are connected.