Clipping, with the use of ScissorStack - garsue/libgdx GitHub Wiki
Rectangle scissors = new Rectangle();
Rectangle clipBounds = new Rectangle(x,y,w,h);
ScissorStack.calculateScissors(camera, spriteBatch.getTransformMatrix(), clipBounds, scissors);
ScissorStack.pushScissors(scissors);
spriteBatch.draw(...);
spriteBatch.flush();
ScissorStack.popScissors();This will limit rendering to within the bounds of the rectangle "clipBounds".
It is also possible push multiple rectangles. Only the pixels of the sprites that are within all of the rectangles will be rendered.