A new version of the GIMP AppImage is available for download. The main difference with the previous ones is that it now enabled most of the optional GIMP features:
Optional Features:
Levin matting engine: yes
Language selection: yes
Vector icons: yes
Dr. Mingw (Win32): no
Relocatable bundle: no
Default ICC directory: /usr/share/color/icc
Debug console (Win32): no
32-bit DLL folder (Win32): no
Detailed backtraces: yes
Optional Plug-Ins:
Ascii Art: no (AA library not found)
Ghostscript: yes
Help Browser: no (WebKit not found)
JPEG 2000: yes
MNG: yes
OpenEXR: yes
WebP: yes
Heif: yes
PDF (export): yes
Print: yes
Python 2: yes
TWAIN (Win32): no
Webpage: no (WebKit not found)
WMF: yes
X11 Mouse Cursor: yes
XPM: yes
Email: needs runtime dependency: xdg-email
Optional Modules:
ALSA (MIDI Input): no (libasound not found or unusable)
Linux Input: yes (GUdev support: no (libgudev not found))
DirectInput (Win32): no
One known issue, on which I am working at the moment, is internationalisations support, which seems to be broken.
As usual, the up-to-date packages can be downloaded from Releases · aferrero2707/gimp-appimage · GitHub.
Enjoy!!!