How can you use an object to mask out objects in blender? As in, a cube perhaps that hides a circle, and then the cube is animated to reveal the circle.
I want this cube to act like an eraser almost; Any part of the mesh it encapsulates needs to disappear, however the remaining portion of the mesh that is not "subtracted" should remain visible. Of course I want to be able to specify a specific mesh that the mask effects.
Also a way to fill in the gaps in the mesh that effect would create automatically would be needed in many instances.
Is this possible? If so, is there another way to achieve this?
Here is the link to the model.
I want the cube to be invisible, and as it rises I want it to reveal the sphere, which is also invisible while it is inside of the cube.