Systems and methods for determining a correct rendering of a candidate entity are provided. An example method includes identifying a first combined image including an image of a reference entity. The reference entity is bound by a first grid including one or more grid cells. The method further includes rendering a second combined image including an image of a candidate entity. The candidate entity is bound by a second grid including one or more grid cells. The method also includes identifying reference and candidate patterns. The method further includes mapping corresponding grid cell patterns of the reference and candidate entities and determining a variance measurement between the mapped grid cell patterns of the reference and candidate entities. The method also includes determining, based on the variance measurement, whether the candidate entity is a correct rendering in accordance with the reference entity.