Physics object ignore certain obstacles

Hi all,

I've just started playing with Construct 2 (after being a MMF2 user for a long time) and I'm loving it. In particular, the physics.

There's one issue I've tried to resolve but been unable to. Is there a way for a particular physics object to completely ignore collisions from another object.

For example: I have two balls at the top of a hill and a wall at the bottom of the hill. I want ball 1 to roll down the hill and bounce off the wall. BUT, I want ball 2 to roll down the hill and PASS THROUGH the wall.

Is this possible?

Thanks!

Sorry, it looks like this topic has been discussed in previous threads... Guess I didn't look hard enough.

http://www.scirra.com/forum/ignore-collision-between-physical-objets_topic48028_page2.html

http://www.scirra.com/forum/disable-collision-for-physics-objects_topic47785.html?KW=

It looks like the only way to do it for now is by using multiple layers. This might not work for the project I'm working on but I'll give it a try.