I'm trying to change the theme of a BootsFaces application and I'm not getting it. On the site says that I have to find a folder called less but I can not find it.
Customization of the BootsFaces.jar
Until there is a new version of the customizer, you can still customize the look and feel taking advantage of the build system. There are many Bootstrap customizers on the net, for example Bootswatch. What you need is a file with the variables to customize the build. Some customizers will provide you a .less file as well.
Put the files in the BootsFaces / less directory of the build and tweak the bs- * files to use your variables / .less file. link