Bright outline on normal map where 2 surfaces meet... what causes this?

Hey,

Every time i import a normal map into UE4 and apply it to my objects I get this weird outline where differences in normal direction occur. Like the compression is adding Normal directions in there that shouldnt be.

NormalError.JPG

As you can see there is bright line of pixels in the indents of the normal map. This is not present in the normal map itself before I import it into UE4.
This happens on every normal map on every model. the compression method is set to normal map. It’s imported as a normal. map. it has been normalised in photoshop. Even if I use No Compression there are still artifacts there.

Is there something that I am missing? (I don’t remember this ever happening in UE3)
It’s currently making everything look really ugly as I have walls full of this and it’s ‘buzzingwith jaggies’ all over the place.

Any help would be greatly appreciated :slight_smile:

cheers