Very jagged normal map issue

Hello, I’m using a 24bit png 2048x2048 pixels as normal map, but I get a very jagged and awful result…

I’m not using compression for the bitmap, so I really can’t understand why it’s so bad…
Any help would be much appreciated!
Many thanks

Did you set the texture type and filter mode correctly?
8953188--1229361--texturetype.jpg

Do you use Compression?

If your PNG is 24bit, then I think you’re getting one 8bit channel converted to an 8bit heightmap. Save your image as a 16bit grayscale image.

Hello all, I’ve solved disabling the mipmaps