begin() {

		this.renderItemsIndex = 0;

		this.opaque.length = 0;
		this.transparentDoublePass.length = 0;
		this.transparent.length = 0;
		this.bundles.length = 0;

		this.lightsArray.length = 0;

		this.occlusionQueryCount = 0;

		return this;

	}
This method is called right at the beginning of a render call
before the scene is analyzed. It prepares the internal data
structures for the upcoming render lists generation.

@return {RenderList} A reference to this render list.