How do I remove the gap using Physics behaviour?

Using the Physics behaviour there is a visible gap between objects. Is it possible to remove it? The only way i think that it could be done is by reducing the collision polygons by a certain ammount, but doing so by hand would be incredibly tedious. Is there a better way?

You can pin a visible sprite representing the object on top of an invisible base object sprite with the physics behavior. The visible sprite can be resized to be slightly larger.

The problem is that it still needs to be done manually for EVERY object, which would be very tedious, as i have a lot of them.

Well... slightly less tedious, as I consider changing the size of an object is easier than modifying collision polygons. You could for example, put all the visible sprites in a family, then use a single set size action on start of layout (self.x/y*1.01 or similar)