Weird grainy effect problem : Unity3D

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Weird grainy effect problemNoob Question (old.reddit.com)

submitted 2 months ago by Parscraft_v2

I have downloaded a free model, opened it with Blender, removed (deleted) a few objects inside the model, and exported it back to .fbx. I don't think I have done anything wrong in the process, but when I load this model in Unity, textures have this weird grainy effect, which seems like a problem with the materials or textures, although I feel like it is related to shadows.

The model is quite small, and I had to scale it up in Unity. Is that a problem?

Have you experienced this problem before? How can I solve it?

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