Black shimmering lines between func_detail brushes

What kind of sorcery is this? :sad:

https://gyazo.com/edc66cd6bacac364aae7f861eebbd4e5

From some angles, it looks ok...

https://gyazo.com/83e17602ddb870c82ecd65af0bd3bcbd

This is how the brushes are put together:

https://gyazo.com/7af9a7f76c82ce4106fb2556d6575ee8

I went ahead and placed the brushes abit differently:

https://gyazo.com/72fcbdc5b998e0170ac55bf2679f7fa3

Which fixed the problem, but now there's a black, shimmering line here instead:

https://gyazo.com/148b1cebd738dd5eac1d5705ff8480c9

I don't really know how I fixed it, but I placed them all in a different way like I did in the fourth picture, applied nodraw to everything and retextured. Now it works fine