Using voxels is just a form to save/arrange your level. That means, you have (usually) a grid where your things are aligned.
No, its not. A voxel is a volumetric object in the game space, its not a polygon or something similar.
And no, its not possible to integrate Voxels into Gamestudio with simple methods since they require a different way of rendering and data storing.
Can we have some reliable sources? Voxels don't have an inherent way of being rendered. They describe a way of representing 3D data that is an alternative to polygons, but representing them with polygons doesn't stop them from being voxels. Minecraft uses voxels, but the low resolution and simple block-based style means there's no need to get any fancier than building a polygonal mesh over the data. Its and Meinkraft's "voxels" are still voxels, even if its not practical in a higher-resolution context. Voxatron
could use polygons to represent its data, but I think I heard it uses a software renderer to render the voxel data by its own means.
Yes, there are ways the engine could support rendering voxels in ways we can't now and thus open up avenues to more dynamic and high-res voxel-based scenery, but let's be more careful with general sweeping statements (not just @Sid -- I believe the "correct" answer is both Rei's and Sid's answers, replacing "No" with "Or").
