Challenges of the week give artists the opportunity to create new and fantastic art based on a weekly theme set by the challenge moderators. They are also a great place to develop core skills.
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|Color and Light||1.1||Do Assignment|
|Color and Light||1.2||Do Assignment||1.3 | 1.4|
|Illusion of Space and Atmosphere||1||Do Assignment|
|Personal Art||1.1||Do Assignment|
For character design? I can't really say that there are any hidden gems for that, that I know of. All i can trully say is to try and gather alot of reference material regarding from diferent cultures around the world and study them regularly. Find out what clicks not only from studying the referece material but also how other great artists mix the culturess up to form something rather unique.
That is really how these things work to the core: references, study and experimentation.
Doing random sillouettes might trigger some ideas too. You never know what works for you until you try it all!
Hope i have helped.