I am a French painter, and I would like to stay longer than 90 days to paint in USA?

You can either get a tourist visa or a student visa, in this case you will need to study something here in a university that has I-120 programs. You can also apply for an extension before your 90 days expire, but you will only get 30 extra days and if you keep asking for extensions it would get suspicious and you could be deported. What I recommend you doing is checking the US immigration web page, they have lots of information and links to other sites that will help you a lot with the decision you need to take. Good Luck!!!

You could get a student visa. I don't know how you will manage. I went to school and all the students stole my art supplies and left me going into to debt to buy more supplies. Right now I am in excruciating pain from an infection from bad food or something. If they only let you stay ninety days eventually someone will try to arrest you and ask you what you do for a living. Then you will seem trite even though you speak a language known for art greats. There are some French and immigrant painters in Hollywood and a couple expatriates in Portland, Oregon but all the same you need some kind of backing or moola to last.

Either apply for an extension or take a break for a week in Mexico or Canada, just across the border.

ARE YOU HERE NOW?....IF SO, THEN APPLY FOR AN EXTENSION.

do you need accomodation?