I’m not sure if this is intentional or not so I didn’t want to file a bug report just yet, but it does seem a bit unusual to me.
Standard buttons in UMG show a darker tint when disabled to hint to the user that the button is not usable. However, when trying to use custom images it does the same. I’ve checked the tint settings and RGB-A are all set to 1.
It doesn’t seem to make sense that buttons with images should darken as well, if we’re using a custom image for when a button is disabled.
Is there a work-around, is this intentional?