This fork makes it work with gtk3. For me at least.
Original created by Forrest Voight <voights@gmail.com>
Based on gdk-pixbuf-psd by Jan Dudek <jd@jandudek.com>
.
$ mkdir build
$ cd build
$ cmake ..
$ make
$ sudo cp libpixbufloader-vtf.so /usr/lib/gdk-pixbuf-2.0/2.10.0/loaders/
$ sudo gdk-pixbuf-query-loaders --update-cache
$ cp x-vtf.xml ~/.local/share/mime/packages/
$ update-mime-database ~/.local/share/mime/
alternatively, there is a PKGBUILD for ArchLinux.