What determines the size of accessories?

I know big head HDJ makes HD and accessories big.



But i have seen robots with MASSIVE accesories, to the point the accessory alone is the same size as a L-size robot.

Or the accessory covers the entire robot (like those golden yukkuri and halloween pumpkin).

Even with a big head HDJ i can only make accessories sightly bigger (almost not noticeable), never to the point where the accessory is as big as a L-size robot.

I thought hd polygon edit meant bigger accessories but that is not the case.

So...how do these people make their robot accessories look so big?

Big body/Big leg parts don't seem to affect accessory size either.

Cyberoid HD.

yeah it's basically fixed to base HD size. the HDJ increases by a fixed percent of the base, so on things where the head is pretty normal-sized to begin with it's not really noticable.