I don't know, some of the the CG illustrations in the recent calendars tended to look way too crisp. I preferred those that tried to match the look of the TV shows or the movies. Also, fans would create hybrid, ”kitbashy” designs, without bearing in mind that kitbashing was mostly abandoned when the production switched to CG. Ideally, an image should look like something that could've easily been canon, down to the ship names and ranges of registry numbers.