Rescued from a corrupted hard drive by: bill33
The author writes:
Although I've had a proper artist for this comic for a while now, I still miss drawing it myself sometimes. For this reason, I made an agreement with him as soon as I welcomed him to the Postcard production staff: when the amount of different color values in the previous comic's image is prime, I draw the comic. When that amount is composite, he draws it. When neither apply - as we had to decide when I once accidentally uploaded a black pixel instead of the relevant day's comic - Greg draws it.
That should explain the monstrosity that is #2976.