HitFilm 4 Pro is compliant with OpenFX version 1.3 and includes OpenGL rendering support.
Compatible OpenFX plugins from other developers can be used inside HitFilm 4 Pro. When you install compatible OpenFX plougins they will be listed in the Effects library alongside HitFilm's included effects.
Note that some developers of OpenFX plugins restrict them to specific host platforms. If you are not seeing OpenFX plugins appearing inside HitFilm we recommend contacting the manufacturer of the plugin.
More information on OpenFX can be found at http://openeffects.org/
If you wish to develop OpenFX plugins for HitFilm please contact us at email@example.com.