True seeing

When the true seeing spell is employed, the caster confers upon the recipient the ability to see all things as they actually are. The spell penetrates normal and magical darkness. Secret doors become plain. The exact location of displaced things is obvious. Invisible things become quite visible. Illusions and apparitions are seen through. Polymorphed, changed, or enchanted things are apparent. Even the aura projected by creatures becomes visible, so that alignment can be discerned. Further, the recipient can focus his vision to see into the Ethereal Plane or the bordering areas of adjacent planes.

The reverse, false seeing, causes the person to see things as they are not: rich is poor, rough is smooth, beautiful is ugly.

Note: This version of true seeing originally appeared in the 2nd Edition Player's Handbook for Advanced Dungeons & Dragons from TSR. Its use here is for the purposes of providing context for the campaign only.