So, since a lot of monthly art challenges are out there, I thought that a list of some of them would come in handy.
Some of these are drawing challenges that some people use as a 3D Art challenge.
Some people do "weekly challenges" instead of daily ones, combining all of the topics from one whole week.
Feel free to add additional challenges you know about in the comments.
- Inktober - Create one ink drawing every day in October. Some people use this for 3D models as well. I've also seen this done with Substance Designer Materials that look like they were drawn with ink. ( https://inktober.com/ )