Rotating an fbo

i am trying to rotate an fbo.

i have tested the following code in ofapp::draw() {}

layer.bind();
layer.getTexture().getTextureMatrix().newRotationMatrix(ofRandom(360), 30, 50, 78);
layer.draw(0, 0);
layer.unbind();

layer.draw(0, 0); draws, but
layer.getTexture().getTextureMatrix().newRotationMatrix(ofRandom(360), 30, 50, 78); has no effect

nothing renders when i use layer.bind(); and layer.unbind();

thanks,
01