In the (long) past you can draw uncensored and add layer/image on it, just make sure all are cover, and wont mind player "patch" the game, until some developer told them to do it themselves and dlsite got sued (stupid jap conservative or gov, i forgot)
When Unity game starts coming out they wont check the raw files but after community keep posting uncensored demo of new d-lis game now it is not possible
Providing uncensored patch for dlsite version even on oversea platform is not allowed, a patreon was taken down before (hint: futa game) so all developers only give you a NO in such file request
Still have hope because dev metioned in one of the comment reply that he or she is interested in steam version...