In your application file, you can upload up to three images per submitted artwork. This is more than sufficient in most cases.
For example, for a painting or photograph, a single photograph is sufficient. For a sculpture or performance, it may be advisable to send several photographs to show your work from different angles. In this specific situation, please send three photographs showing different angles.
However, if you did manage to send more than three images per artwork and you find yourself blocked because your application can not be validated by the system, you will need to delete some of the photographs so the system can correctly validate your file.