JVM Arguments¶

OptiFine supports running the game with arguments, some of which are not available in the options menu.

The system properties have to be added in the field "JVM Arguments" in the launcher profile. All arguments must be prefixed with -D.

Argument	Values	Meaning
`log.detail`	Boolean	Enables extended logging.
`saveTextureMap`	Boolean	Save the final texture map/atlas in the folder `debug/`.
`shaders.debug.save`	Boolean	Save the final shader sources in the folder `shaderpacks/debug/`.
`animate.model.living`	Boolean	Automatically animate all mob models. Useful for testing Custom Entity Models.
`player.models.local`	Boolean	Load the player models from the folder `playermodels/`.
`frame.time`	Boolean	Show frame time in milliseconds instead of FPS. Added in version G6.
`gl.debug.groups`	Boolean	Enable OpenGL debug groups.
`gl.ignore.errors`	List of integers	Ignore OpenGL errors based on the comma seperated list of error IDs.
`cem.debug.models`	Boolean	CEM debug models. Automatically generate CEM models for all supported entities using different colors for each model part The part names and colors are written in the log.
`chunk.debug.keys`	Boolean	Enables chunk debug keys, see Debug Keys. Added in version H3.

For example, to enable extended logging, add -Dlog.detail=true to the JVM arguments.

 Assumes the latest OptiFine version.
 Updated to commit 15ef3106.
 Open source at https://gitlab.com/whoatemybutter/optifinedocs.

Last update: 2024 April 30