From what I've seen, it will produce results like you see in video game characters. From a distance, it's OK, but it's never going to work for a portrait. If you're doing architectural visualization and you need a bunch of different people to populate a scene, then it has its uses.

For making real characters that stand up to close scrutiny, this is no shortcut.

If you're serious about making a specific face (both color and shape) you need a specialized tool and skills to use it. Something like ZBrush and 2000 hours of practice.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)