ZBrushCentral

Combining normal Maps

Sorry if this question has already been asked answered some where else. I didn’t find what I was looking for in the FAQ area though.

I’m having trouble getting one combined normal map. I bring in my object and break everything up into the different sub tools according to my UV’s. I can create all the single UV maps of the sub tools, but once I combine everything back together I can’t seem to create a normal map. I’m I missing something or doing something wrong? Thank you in advance for your replies.