Combining normal maps from different bakes?

Rosquist

Hi, I have a character that I am working on, and I have finished both the high and low poly. The problem is that the high-poly is too heavy to put in marmoset. What I've done is to split it into four bake groups that I baked, and now I want to combine the maps into one 4K map. My first attempt was to bake the normals without padding and then just merge them in PS with overlay. It worked, but seams became visible due to the lack of padding.

The problem is that I want some padding. Is there any way to merge the normals into one map with padding?

Shuma

If you have transparency on your file, Xnormal have a photoshop filter to add padding "xN dilation", I never try it on normalmap, but maybe it could help.
Have you try to decimate you Hipoly before baking? It could help to make only one bake, and lost details could be barely visible.