Entity modifiers don't modify it childs

Question

I've an Entity "holder" with some child Sprites and ButtonSprites.
When I do something like:

entity.registerEntityModifier(new FadeInModifier(ALPHA_MODIFER_DURATION));

nothing happens, but if I register this EntityModifier to the child Sprites one by one it works. What's happening?

ps: MoveModifier works though.

Answer 1

Since an Entity it's a "holder" the only EntityModifiers who affect Entity childs are the ones regarding position and size, so that's why FadeInModifier wont "work".