How to remove these black outlines appearing on model?

[NicCrimson (NickName)]

I extended the textures a bit outside the UV already

[Dude_Danish (DANISH)]

Replace the entire background with the primary color of set model, instead of the black background?

[Hazelfluff]

erm… extend them a bit more idk?

what do the uvs look like? if you remove all black space except for where its strictly necessary perhaps that would help?