Dear @MickeyOne
Recently a 'Thumbnail Grid Filter' was built in by Armin, so the function of clicking categories and seeing the related projects is there:
http://laythemeforum.com:4567/topic/6408/category-filters-with-lay-theme-version-3-6-1?_=1615336804678
The difference in your case is how to use an Image instead of Text. Some trickery would be needed either with JQuery to go in and replace the Text with an Image.
A crude hack would be to place an Image over the Text so the user would not see it -The issue would be if you are able to click the Text underneath then
It would be a little difficult, the option is not built in at the moment sorry Mickey.
Best
Richard
