worldEdit.checkMaxBrushRadius(radius);
BrushTool tool = session.getBrushTool(player.getItemInHand());
tool.setSize(radius);
tool.setBrush(new SmoothBrush(iterations, naturalBlocksOnly), "worldedit.brush.smooth");
player.print(String.format("Smooth brush equipped (%.0f x %dx, using " + (naturalBlocksOnly ? "natural blocks only" : "any block") + ").",
radius, iterations));
}