Hi Oliver. I hope that I understood you. And you want to delete some objecs from the map. You can do that by using latest version of Giant Editor. You need to register here and after you can download GE https://gdn.giants-software.com/index.php
not really. You said that you cleand the the Map"Ebsdorfer Heide". I Love this Map but its have a big size. I understood that you clean the map and you delte all the things that not be used. I remeber tha Jogi said, that he didn´t delete all the things that not be used from the Map.
oh now I get what you mean. Sadly I don't know Deutsche language. I opened BaseMap.i3d and moved every texture that used in the map into one folder. Everything else was deleted because map is not using anything if it's not mentioned in the "files" lines in .i3d That's how I've cleaned and tidy up that map. Also I've rearranged some files like any xml into xml folder with respectively changing lines to those moved xmls. It's painstakingly long an boring process.