One of the new features of SharePoint 2013 is the image renditions. When configuring this you may find the following error:
The blob cache is not enabled in this web application. Image renditions will not be generated until the blob cache is enabled. For information on turning on the blob cache, please review the product documentation.
Resolution:
Open the web.config file for the web application in a text editor. Search for “blobcache location”.
Inside this tag, change the “enabled” attribute from false to true (see below). This will enable blob cache on the server to enable SharePoint 2013 image renditions.
<BlobCache location="C:\BlobCache\14" path="\.(gif|jpg|jpeg|jpe|jfif|bmp|dib|tif|tiff|themedbmp|themedcss|themedgif|themedjpg|themedpng|ico|png|wdp|hdp|css|js|asf|avi|flv|m4v|mov|mp3|mp4|mpeg|mpg|rm|rmvb|wma|wmv|ogg|ogv|oga|webm|xap)$" maxSize="10" enabled="true" />
Save the web.config file and refresh your browser page. All sorted!
