muraDisplayExtendedAttributeImage.cfm

<!--- Assuming you've created an extended attribute 'File' type called 'extAttributeImage' --->

<!--- In a Mura Page Template --->
#$.createHREFForImage(filename=$.content('extAttributeImage'),size='myCustomSize')#

<!--- In a Mura Component --->
#$.createHREFForImage(filename=$.component('extAttributeImage'),size='myCustomSize')#

<!--- In the context of an iterator --->
#$.createHREFForImage(filename=item.getExtAttributeImage(),size='myCustomSize')#