It is possible, though understandably difficult. In order to break free from an illusion, one must fight against what they see, and will their bodies to close their eyes.

However, in the case of very powerful illusion, the creature in question may not even be aware that they are in an illusion. My illusions are able to affect all of the senses and can seem quite real, even when they are weak.

In the case of volunteers, I will be ending the illusion myself. It is a far smoother process that way.