What would be an accurate and fast way to make hitboxes?
I was thinking about mask based hits (skins), or invisible boxes, which connected to bones (the bodyparts).

Are there any more ideas?

Greetings Random.

look at the TUST hitbox source code:
it provides hitboxes aligned to bones or vertices, depending on the animation style you use.

Using second method for my game and I have to admit that its very accurate.
But it might be slow if you have many players/enemies due to many _bone calls.

Well i use the Hitzone method provided by superku. I tweaked it a bit.
I have the hitzone model with < 500 vertices and a detailed ghost model as the seen model, so updating the polygonal collision hull doesn´t take so long.
Otherwise it takes always around a second to update the collision hull.
It´s way more accurate than the hitbox method, faster and easier to implement.

@alibaba: Nice, that's how you do it! Sadly the c_updatehull() call is the biggest disadvantage of that system and I highly suggest (to other users) to only use low poly (I'd even say notably less than 500 polygons) models for said collision detection.

Superku's hitboxsystem works the best for me personaly.

Thank you very much!