I need help remembering a paperback style book that had a fantasy adventure computer game being played by a young boy and then followed up I believe by his older sister whom I presume had to rescue him. The way to find yourself immersed in the game was to calibrate your eyes to the screen.
I believe some of the in game characters were of different races as well.
There was a human female character who was extremely attractive who gave the one rule that you could not try and see any of the characters or her naked. The boy attempted to peer at her and was either sucked in but thrown into another part of the world or was kicked out. I am not quite sure.
Also what I remember is that it had a lot to do with exploration of the surroundings, like a magical hike and that it was more emotion based with the burgeoning development of the young characters feelings/attractions/relationships.
Anyone have any clue? The color was really multi-colored and from what I recall, beautiful to look at.