Collisions between two different layers w/ diff scroll ratio

I have two layers one with the scroll ratio=0 and the other with it 100%.

How do I detect a collision between object A on one layer with object B on the other?

I can't match position, 'cause then it'd have to match perfectly.

Any Ideas?

Why do you need to use two different scrolling rates for your layers?

Anyway, you could try something like this:

http://dl.dropbox.com/u/529356/scrollingcollision.cap

v0.99.84

The colliders are on the 100% layer but the enemy sprites are on the 0% layer.

It's for a nebula, instead of have hundreds of clouds, I put them on a higher layer and have them move. So it looks like a never ending nebula field. And I wanted the explosions that happen at game level push the clouds. It'd be a cool effect but that's all.

Thanks, for the example. I'll take a look at it later.