Getting to the rules is a bit convoluted, you have to click the Enter link to go to the contest page, then there's a details or some such link, anyway this'll take you there: https://www.renderosity.com/contests/1595/2022-3d-holiday-contest

I would not expect 3d category to allow A.I. stuff because so far none is 3d that I know of. But the 2d section, one would hope, should have leeway in either mixed media or our brand new A.I. section to perhaps consider a separate category. Or even a separate mini-contest as a sidebar to the big one. 

AND ... I checked under the 2D category entry page as well. Same rule: 

• A.I. Art is not permitted.