Former MSc student Theodora Banica published an article in PLoS One in which we investigated whether Kanizsa (illusory) contours are generated and perceived when observers are unaware of the inducers. This follows up earlier conflicting reports on this question. We conducted attentional cuing experiments as well as direct discrimination experiments while in some trials the inducing shapes were masked from awareness. We found no evidence that observers perceive Kanizsa contours when they are unaware of inducers.
Banica, T, & Schwarzkopf, DS (2016). Induction of Kanizsa contours requires awareness of the inducing context. PLoS One 11(8): e0161177.