function _generateCubeUVSize( imageHeight ) {

	const maxMip = Math.log2( imageHeight ) - 2;

	const texelHeight = 1.0 / imageHeight;

	const texelWidth = 1.0 / ( 3 * Math.max( Math.pow( 2, maxMip ), 7 * 16 ) );

	return { texelWidth, texelHeight, maxMip };

}
Generates the cubeUV size based on the given image height.

@private
@param {number} imageHeight - The image height.
@return {{texelWidth: number,texelHeight: number, maxMip: number}} The result object.