I am trying to edit one of the standard SU materials to change its colour. It is called Concrete Masonry Unit and is a cross hatched pattern in pale grey. I would like to change the pale grey to some other colour.
If I try to edit the colour in the SU palette, it is the background colour that changes. And if I then apply that, I just get a colour fill, even though the icon suggests it should be overlaid with the crosshatch pattern. Like this: