White seams/edges with polygon fill and uvs brush error

drochroma

Hello, I am working on a personal project and I have the next problem. I baked the normal map on marmoset with the configuration below: 

So then, I import the low poly mesh into substance painter with the normal map baked on marmoset with this configuration:



 I apply a material with a blask mask and select the tool Polygon Fill to paint any object of the scene, but I obtained the next result on the edges. 



I don't know why I get this, I put a moderate padding on marmoset and the UVS are correct. I thought: well, I'll adjust this painting on the UV screen with the brush, but the brush is also getting a strange error  where everywhere I clicked I paint the entire UV map and the brush is always extremely big despite being with the smallest size.

I searched for everything on Google but nothing solved my problem. I will  be thankful to anyone who might help me with this. 

drochroma

Okey, with help we've discovered a hidden mesh was in top of all the uvs and was affecting the baking. Now everything is solved.