Hello,
when opening an old file many links with materials got lost (maybe i’ve changed the name of some folder, my bad), is there a way to do a sort of “bulk relink” or should I do it one by one?
yes, first there is automatic file resolver. if your files are named the same but the folder structure changed, that shall work out of the box. If it doesn’t you need to give it a little hint where your files are. Just navigate to Rhino search folders in the settings and add your new root folder there. V-Ray will search for files 3 levels down from every folder you entered there.
The semi-automatic way is to use the File Path Resolver.This is available under the AssetEditor window. It is quite convinient but may require some extra manual work