I suppose I must have changed something without meaning to, because the 3D Lab isn’t working correctly anymore. It’s the size slider–the bricks scale properly but the floor scales the opposite–the floor gets smaller when the bricks get bigger and vice versa. Also the bricks seem to be one brick higher than they should be–they’re kind of floating in the air above the floor.
Instead of continuing to fiddle with things to find out what’s changed, I’d like to just restore the original project from scratch. Is there some way to do that? If not, is there some way to cut and paste the original code from somewhere else?