How to prevent blurred edges

[schroef]

Im new to this app and noticed you comment in the official repo.

I havent looked at any tutorial or whatsoever. So perhaps this is some easy.
I noticed when work in say the heightmap, due to how it works for having control over the details. When the image has this harsh contrast like white with a mapped skin texture, it starts to blur the edges, this causes issues around the seams.

Is there some we can do about this?

I tried fixing it by use Flaming pear to make image stretch to the border. But then the app completely reacts different to the image. In general it seems to have issue when working with dark skin.

Perhaps im doing it totally wrong, but i cant get the image dark enough when i used the Flaming Pear trick to solve the white edges around the texture.

This is a screengrab from the original image

[schroef]

What i dont understand is why the image gets a total different outcome when i add that image with the adjusted
white ares to prevent blurring. The preset heightmap looks completely different?

Original image with white areas around uv islands

Adjsuted image > outcome is totally different