How do I go through an object only partially?

Hello!!

I'm trying to achieve the effect on the image below (the boy traspassing partially the bar, but not beig able to walk through it) in order to create something similar to a real perspective. But when I ad 'solid' behaviour to the objects they collide just in the edge. I tried to change the origin point and it didn't work.

Do I have to create a container with different objs and behaviours? Or it has something to do with the physics? I'd be grateful for some tips or tutorials, if there are any!! Thankyou!

Edit the collision box, it's the button under the imagepoints in the image editor. You can add more points and shape it how you want.

Edit the collision box, it's the button under the imagepoints in the image editor. You can add more points and shape it how you want.

Thankyou so much!!!!!!!!!!!!