We love illustrations! Vector files should be saved in raster format, JPG at a high resolution, saved at highest quality and submitted in this format. You can also upload an additional format (AI, PNG, CDR or EPS extensions accepted) after the JPG upload using the FTP upload/Additional sub-folder or as soon as the JPG is accepted. In some cases (e.g. layouts of web templates) it is advisable to upload the additional format before the review of the JPG file in order to increase chances of approval.