No, you could model separate elements that you could then use as stamps in the normal map for example, but alterating the model or the bakes is not allowed.
@NoRank You can add other renders if for example your character has cool features that may not show very well on the main render but it has to still include that camera facing render. @Burpee License based entries are not encouraged. Of course you can take inspiration from what exists, but not copy existing works.