unwarap not working correctly if texture isn't square

[BrahRah]

I've used both unwrap basic and unwrap grid and it unwraps like this.

[pagoru]

Same for triangles

[noio]

Yeah, I'm currently not supporting rectangular textures 😅.

It wouldn't be suuuper hard but some of the tools just assume square textures to make things easier.

(But i agree that sometimes it's nice to work with a rectangle, some UV islands shapes also just fit better on a rect)