There are no legal rules permitting the use of a specific number of words, a certain number of musical notes, or percentage of a work.
In the US. Yes. Copyright law, most recently the DMCA. Unlike physical artwork (which is a matter of contract, without which allows resale without licensing due to the ``first sale doctrine''), digital artwork is licensed not sold unless you have an explicit written contract transferring the copyright.
In fact, reproductions started as a side income for artists who received royalty every time their replica was sold. It is not illegal to copy other people's art as long as you are promoting it as a replica. The entire legality drops curtain as soon as you start counterfeiting.
Copying a painting for personal use is typically legal, as long as you do not intend to sell or distribute the reproduction. Personal use implies that the copy is for private enjoyment and not for profit. However, public display or sale could breach copyright laws, even for personal reproductions.
As the copyright holder, you retain the exclusive right to reproduce your artwork. This means that you have the authority to create copies of the original piece, whether in the form of prints, posters, or any other reproductions. Anyone else who wants to reproduce your work must seek your explicit permission to do so.
Ready to Exhibit Your Art? Here Are Steps You Can Take Try a home show and invite your friends. Connect with a local business and see if they might be interested in hanging your work in their establishment. Get together with a few other artists and rent a space for your exhibition. Enter juried exhibitions.