When I use the sphere brush in the voxel room the brush works both on the object and outside it, unlike other brushes which will only work when the cursor is over an object. This makes it difficult to rotate the object because I have to move the cursor outside the navigation zone in order to rotate the view (I have rotate set to left mouse button). I've messed with the navigation settings to no avail, leading me to believe it is a problem with the brush itself rather than the navigation settings, but I'm not sure. If anyone knows a way to make it so that the sphere brush only works on an object, it would be much appreciated!