Just like transforms, it is possible to override renditions. The following example effectively disables the doclib rendition, used to create the thumbnail images in Share’s Document Library page and other client applications. A good name for this file might be 0200-disableDoclib.json.
{
"renditions": [
{
"renditionName": "doclib",
"targetMediaType": "image/png",
"options": [
{"name": "unsupported", "value": 123}
]
}
]
}
Because there is not a transformer with an transform option called unsupported, the rendition can never be performed. Having turned on TransformerDebug logging you normally you would see a transform taking place for -- doclib -- when you upload a file in Share. With this override the doclib transform does not appear.