DragoonAethis [1] filed a deletion request for substance-designer-6 [2]: Allegorithmic no longer allows downloading older package versions from AWS, thus breaking this package for good. (This one was created before the original package was updated to the latest version, but it's now kept up-to-date.)
[1] https://aur.archlinux.org/account/DragoonAethis/ [2] https://aur.archlinux.org/pkgbase/substance-designer-6/
