Just noticed that models' comments don't support unless one file, which is kinda annoying when uploading multiple renderings (like here).
I also can't add a comment including only a rendering; text must be added, so I had to type a "." in order to upload the rendering...
Can multiple uploads be supported? As well as attachment-only comments?
If you don't receive the email within an hour (and you've checked your Spam folder), email us as confirmation@grabcad.com.