I understand the translation issues, there are many games here where the dialog is not written in English first, but this is the first game I have heard where the lead developer is not the project manager, and does not have the skills to run the development team. Also, there is no rendering, I think you meant "poser", since BlueCat is just posing illusion assets in StudioNeo.
So if this key person decides that they are too ill to continue, or just don't have the time anymore, this game is finished? I know BlueCat has said several times that he is determined to continue no matter what, but if he doesn't have the skills to run the rest of the team, it sounds like it will be out of his hands.