Shoutbox

Those animations are controlled by messenger, there are tags you can use to call different kinds of animations but they are really bad. Like they do not work on everything as they should.

In some cases you have to restructure a button just to get the effect you want. It's a bit much to explain just like this so yeah. But the easiest way of doing it is like this:

Button[Class="TransparentButton"]
{
Background:rcclr(20017);
ContentAlign:MiddleCenter|EndEllipsis;
Tooltip:True;
Alpha:100;
Animation:Log|Alpha|VerySlow;
}
Button[Class="TransparentButton"][MouseWithin]
{
Background:rcbkd(20201);
Alpha:255;
Animation:Log|Alpha|fast;
}

You set a lower alpha for the state you want to animate and then use the Animation:Log|Alpha|fast; tag to animate it. But yeah the problem is that alpha changing affects child elements (including icons) So its hard to control it properly.