Here's the in-game cello (if it is even one, i may be wrong) and there's the best picture of a cello in a similar position that i could find, even if there's a stock image watermark:
The colors is the ones i do find acceptable with, although i think the shape looks quite off, especially the body.
sorry, so is the shape your issue with the in-game cello?
because comparing both pictures, the in-game version seems to have all features from the real one? i don't see how it looks "quite inaccurate" or how you can ask if "it is even a cello".
The colors is the ones i do find acceptable with, although i think the shape looks quite off, especially the body.