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Texture artifacts in Unreal Engine 4 Help

Hi everyone! Please could someone help with my texture issues in unreal? I exported textures from substance painter in targa format, in 4K, 8 bits with dithering.
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But in ureal it appears awful artifacts.
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I also watched many tutorials, and turned off sRGB in packed map (only on packed map, i didn’t touch the rest of maps, and my normal map was imported as a normal),but it didn’t help.
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And i imported this object as a statistic mesh, also tried to export textures without dithering,but unsuccessfully.
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I also exported this textures to maya, but there everything was great.
Thank You in advance, and sorry for my english.