enableShaderPass() {
        if(this.stacks.scenePasses.length && this.stacks.renderPasses.length === 0 && this.renderer.planes.length) {
            this.renderer.state.scenePassIndex = 0;
            this.renderer.bindFrameBuffer(this.stacks.scenePasses[0].target);
        }
    }
Enable the first Shader pass scene pass
*