I think that if you submit a Generated 3D Art, I think it won't have a chance winning on the roobet tournament especially if the 3d Art generator is open in public. You will have a chance if the generator you have is made by yourself and entirely made for winning the roobet tournament. I believe that judges is considering the hardwork and efforts of those artist so submitting a common generated art even if it's 3d won't stand a chance against hand drawn arts.
The art contest are for testing your creativity and if you are using some image generation apps for it then you don't have a chance to win or deserve to win at all because you are not even working hard for it and just submitting image generated by that app but contest are for original art only.But what I was saying above was there are some members who make 3D art themselves but not on big level.