Normal Maps exported from Zbrush are giving me problems.

Menriet

Hey guys.

I'm just getting into sculpting in zbrush and making high poly models and am having issues with getting a proper normal map exported.

This is the model that I have in maya and it already has its uvs mapped.


after bringing it into zbrush and sculpting on it, I am left with this normal map.

and you can see the gradient on the map but im just wondering how it go there in the first place and how to avoid this again?

This is what it looks like in maya with the normal map applied


Sorry if these are pretty noob questions that are answered here frequently but seeing as how I don't know what the problem is, it wasn't very easy for me to even find topics that were related to my problem. Any insight would be helpful.

m4dcow

Zbrush isn't great at projecting normals, use Maya or xNormal instead.

It sort of looks like zbrush softens the low poly before projecting which is why there are all these gradients on the UV map.

Hang10

m4dcow wrote: »

use Maya or xNormal instead.

After that try and play with inverting the green channel as well.

Alidium

If that dose'nt work, try champhering the corners just a bit. Normals don't like sharp edges in my experiance.

Menriet

Oh yeah doing the normal mapping in maya worked very well. Xnormal seemed to be projecting through the object, so on the inward extrusions it was overlapping in a way.


So here is how it looked with the maya-produced map. Thanks for all the help guys!