If you are using Improved Layered Navigation and want an image of configurable product to change according to the selected attribute, please follow these simple steps.
Go to System > Configuration > Layered Navigation settings > Configurable Attribute Codes and insert a list of attribute codes separated by commas. This way you'll be able to show specific image for configurable products.
Looking for Magento 1 extensions? At Amasty, we offer a wide range of options to enhance your store. Explore our selection here.
See more details on Improved Layered Navigation page
Login and Registration Form