Texturing materials/inconsistent results?

[Neural Blankes]

I'm working with some normal maps on an object I created (mesh), and while the normal map appears properly, I'm seeing some inconsistency with the display results between two halves of the same object.

Consider a coin with the exact same image on both sides, including several spherical bumps. 

What I'm seeing, essentially, is on one side, all the bumps are properly convex, but on the other side, about 1/4th of the bumps come out concave or even distorted.

I've gone over the normal map itself in Photoshop, and the details are quite consistent among all the bumps, but the display isn't going that way, and it is consistently on one half of the object, never both.

 

Anyone else run into this?  Is there a workaround?

[Kwakkelde Kwak]

All I can think of is your UV map is mirrored, which is fine for a diffuse texture, but not for normal maps.

I have only seen this effect on prims, not on mesh.

If the effect is only visible on one SL face, you could adjust the normal map by inverting the R and/or G channel.

[Neural Blankes]

Thanks.  I'll check the UV's.  I did use a mirror command, but I figured that the entire thing would be inside out of that's the case, however mapping I did was with a calculated atlas map, so the system may have flipped some of the polygons on it's own.  I appreciate the advise.

[IvanBenjammin]

Post some pics if you're still having trouble.

Normal maps can be tricksy - sometimes they'll look inverted but are in fact not, and its just an optical illusion. A couple of lights around your work area can really help when working with normal maps.