remove() {
        this.target = null;
        // force unbinding frame buffer
        this.renderer.bindFrameBuffer(null);

        if(this.writePass) {
            this.writePass.remove();
            this.writePass = null;
        }

        if(this.readPass) {
            this.readPass.remove();
            this.readPass = null;
        }

        // call original remove method
        super.remove();
    }
Override the regular remove method to remove the 2 render targets
*