Collision "size" of particles not changing

Hi,

I want to let the player-ship collide with particles spawned by a particle system.

If i use "small" particle size (left hand picture), the player can collide with the "kanji-bullets" without any noticable problem. But...

If i use a bigger starting particle size (right hand picture), it seems only the Particle-material is scaled up, but not the collisionbox of it.

In this case the player can nearly fly through the entire "bullet" without getting hit, except he is flying exactly through the middle of the particle.

Anyone got an idea how i can affect the size of the collisionbox of a particle? Or is it static?

 

*pin*

 

*repin* ...seems that i have to code an own particle system with changeable "collisionboxes