I would like to be able to use the 'featured image' functionality, found on post types, for a custom taxonomy.
I have a taxonomy called 'collections' and I would like each collection to have a featured image. I will then use the featured image in a custom template that will show all of the collection, their titles and featured images.
I need the uploaded image to be resized into the custom image sizes that I have set in my theme.
There is a similar question here: Can I set a default featured image for a category? However, the top answer won't work for me, and I can't rely on a plugin.
Can anyone help?