[MaxMustermann]

Sorry, it seems like my post was a bit confusing. The link to the wiki was meant to show you what "advancedsettings.xml" is, in case you've never heard of it. As I said, the setting is undocumented, so you won't find it in there. The link to the source code of kodi, more precisely the code that reads the advancedsettings.xml file, is the proof that the "remotethumbs" setting is actually used by kodi (although undocumented). And the code posted is what you should add in the advancedsettings.xml.