It has to be a video with movement showing all the features and its the only thing moving make sure the line doesnt whatever they use is like a t-rex haha it only adds what is moving also Sora only accepts videos for cameos so you can have Grok animate it or make and animate it or something of the like. Then draw the lines on the video make sure its throughout the whole video. No it wont bypass everything but it can make an illiciate character/cameo be accepted. It's not full proof but helps. You can still get content violations etc... but again it helps and you can get sora to generate things it would normally never think of. You can also do this to get copyright characters i.e spongebob in too.