If it was a simple average it would have been mangled. This is a deliberate fine-tune of the model to the particular style. For fine-tuning you need some type of input, if generated or human made doesn’t matter.
The reason why they fine-tuned to this particular style is unknown, but they might be:
To quickly and not as expensively produce and release a usable model in the then more heated, now slowing down competition for better and better models
To reduce the model size as there is no need for lots of data on multiple styles.
To give a distinct comics style to their model, so to make people associate the image to their model instead of OP
There is nothing wrong with fine-tuning, and it is very often necessary to have the output not be gibberish.
If it was a simple average it would have been mangled. This is a deliberate fine-tune of the model to the particular style. For fine-tuning you need some type of input, if generated or human made doesn’t matter.
The reason why they fine-tuned to this particular style is unknown, but they might be:
There is nothing wrong with fine-tuning, and it is very often necessary to have the output not be gibberish.