@sleekdigital Hey there! To update your entry, head over to the contest page and click the edit your entry link in the top banner. From there if you’re looking to update the render, check the “remove image” check-box and click update entry. Once you do this, you’ll be able to re-upload an updated image.
Of course if that is giving you trouble, we can work to delete the entry from our back-end and let you upload a fresh one!