Final answer:
You described a Christmas wallpaper with a subtle sub-pattern visible under certain lighting conditions but found it irritating. Wallpaper choice is subjective, and what's important is your own visual comfort with the design.
Step-by-step explanation:
I understand you're asking about a Christmas wallpaper that has a sub-pattern visible only under certain lighting conditions and not clearly seen. The description of the wallpaper suggests that the sub-pattern might create a subtle visual effect, which can be a unique aesthetic choice for a wallpaper design. Sometimes, wallpapers with such intricacies in design can add depth and texture to a room, making them interesting to look at from different angles or in different lighting conditions.
However, the fact that you described the sub-pattern as particularly irritating indicates that it may not meet your preferences or expectations. Choosing a wallpaper is a personal decision, and what might be appealing to some might not be to others. It's all about the visual comfort and enjoyment you get from the wallpaper in your daily environment.