Obscured feature detectors are disclosed. An obscured feature detector includes a sensor plate array including three or more sensor plates, each of the three or more sensor plates configured to form a first end of a corresponding electric field and to take a sensor reading of the corresponding electric field. The corresponding electric field varies based on a proximity of the sensor plate to one or more surrounding objects and on a material property of each of the one or more surrounding objects. The three or more sensor plates include a first sensor plate that has a first shape and a second sensor plate that has a second shape that is different from the first shape of the first sensor plate. The obscured feature detector also includes one or more common plates to form a second end of the corresponding electric field of the three or more sensor plates.