[VierScar]

Could do something funky like convert it to grayscale, add a 4th "colour" channel and put the grayscale image it that

[mishu2]

I'm actually trying to reduce the 'funkyness', initially the idea was to start from a child's sketch and bring it to life (so kids can safely use it as part of an exhibit at an art festival) :)

There's a world of possibilities though, I hadn't even thought of combining color channels.

[fouc]

I think they were suggesting that it might be possible to inject the initial sketch into every image/frame such that the model will see it but not the end user. Like a form of steganography which might potentially improve the ability of the model to match the original style of the sketch.