Hi,
The images are not required on products. But if there is no image, HikaShop will display the default image.
There are different solutions possible but we have to know more about your requirement in order to give you the most appropriate solution.
What do you want to do exactly ?
How do you want to make the difference between a product with and without an image ?
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.