| Answer | Crossword Clue |
|---|---|
| SPATIAL | Like a Zollner illusion |
| SPATIAL | Like the illusion of a mirage |
| scrims | piece of such fabric used as a drop, border, or the like, for creating the illusion of a solid wall or backdrop under certain lighting conditions or creating a semitransparent curtain when lit from behind |
| scrim | piece of such fabric used as a drop, border, or the like, for creating the illusion of a solid wall or backdrop under certain lighting conditions or creating a semitransparent curtain when lit from behind |
| illusional | of or like an illusion |
