Usage: blender [args ...] [file] [args ...]
RenderOptions:-bor--background
Run in background (often used for UI-less rendering).
The audio device is disabled in background-mode by default
and can be re-enabled by passing in '-setaudo Default' afterwards.
-aor--render-anim
Render frames from start to end (inclusive).
-Sor--scene<name>
Set the active scene <name> for rendering.
-for--render-frame<frame>
Render frame <frame> and save it.
* +<frame> start frame relative, -<frame> end frame relative.
* A comma separated list of frames can also be used (no spaces).
* A range of frames can be expressed using '..' separator between the first and last frames
(inclusive).
-sor--frame-start<frame>
Set start to frame <frame>, supports +/- for relative frames too.
-eor--frame-end<frame>
Set end to frame <frame>, supports +/- for relative frames too.
-jor--frame-jump<frames>
Set number of frames to step forward after each rendered frame.
-oor--render-output<path>
Set the render path and file name.
Use '//' at the start of the path to render relative to the blend-file.
The '#' characters are replaced by the frame number, and used to define zero padding.
* 'animation_##_test.png' becomes 'animation_01_test.png'
* 'test-######.png' becomes 'test-000001.png'
When the filename does not contain '#', the suffix '####' is added to the filename.
The frame number will be added at the end of the filename, eg:
# blender -b animation.blend -o //render_ -F PNG -x 1 -a
'//render_' becomes '//render_####', writing frames as '//render_0001.png'
-Eor--engine<engine>
Specify the render engine.
Use '-E help' to list available engines.
-tor--threads<threads>
Use amount of <threads> for rendering and other operations
[1-1024], 0 to use the systems processor count.
CyclesRenderOptions:
Cycles add-on options must be specified following a double dash.
--cycles-device<device>
Set the device used for rendering.
Valid options are: 'CPU' 'CUDA' 'OPTIX' 'HIP' 'ONEAPI' 'METAL'.
Append +CPU to a GPU device to render on both CPU and GPU.
Example:
# blender -b file.blend -f 20 -- --cycles-device OPTIX
--cycles-print-stats
Log statistics about render memory and time usage.
FormatOptions:-For--render-format<format>
Set the render format.
Valid options are:
'TGA' 'RAWTGA' 'JPEG' 'IRIS' 'AVIRAW' 'AVIJPEG' 'PNG' 'BMP' 'HDR' 'TIFF'.
Formats that can be compiled into Blender, not available on all systems:
'OPEN_EXR' 'OPEN_EXR_MULTILAYER' 'FFMPEG' 'CINEON' 'DPX' 'JP2' 'WEBP'.
-xor--use-extension<bool>
Set option to add the file extension to the end of the file.
AnimationPlaybackOptions:-a<options><file(s)>
Instead of showing Blender's user interface, this runs Blender as an animation player,
to view movies and image sequences rendered in Blender (ignored if '-b' is set).
Playback Arguments:
-p <sx> <sy>
Open with lower left corner at <sx>, <sy>.
-m
Read from disk (Do not buffer).
-f <fps> <fps_base>
Specify FPS to start with.
-j <frame>
Set frame step to <frame>.
-s <frame>
Play from <frame>.
-e <frame>
Play until <frame>.
-c <cache_memory>
Amount of memory in megabytes to allow for caching images during playback.
Zero disables (clamping to a fixed number of frames instead).
WindowOptions:-wor--window-border
Force opening with borders.
-Wor--window-fullscreen
Force opening in full-screen mode.
-por--window-geometry<sx><sy><w><h>
Open with lower left corner at <sx>, <sy> and width and height as <w>, <h>.
-Mor--window-maximized
Force opening maximized.
-conor--start-console
Start with the console window open (ignored if '-b' is set), (Windows only).
--no-native-pixels
Do not use native pixel size, for high resolution displays (MacBook 'Retina').
--no-window-focus
Open behind other windows and without taking focus.
PythonOptions:-yor--enable-autoexec
Enable automatic Python script execution.
-Yor--disable-autoexec
Disable automatic Python script execution (Python-drivers & startup scripts), (default).
-Por--python<filepath>
Run the given Python script file.
--python-text<name>
Run the given Python script text block.
--python-expr<expression>
Run the given expression as a Python script.
--python-console
Run Blender with an interactive console.
--python-exit-code<code>
Set the exit-code in [0..255] to exit if a Python exception is raised
(only for scripts executed from the command line), zero disables.
--python-use-system-env
Allow Python to use system environment variables such as 'PYTHONPATH' and the user site-packages
directory.
--addons<addon(s)>
Comma separated list (no spaces) of add-ons to enable in addition to any default add-ons.
NetworkOptions:--online-mode
Allow internet access, overriding the preference.
--offline-mode
Disallow internet access, overriding the preference.
LoggingOptions:--log<match>
Enable logging categories, taking a single comma separated argument.
Multiple categories can be matched using a '.*' suffix,
so '--log "wm.*"' logs every kind of window-manager message.
Sub-string can be matched using a '*' prefix and suffix,
so '--log "*undo*"' logs every kind of undo-related message.
Use "^" prefix to ignore, so '--log "*,^wm.operator.*"' logs all except for 'wm.operators.*'
Use "*" to log everything.
--log-level<level>
Set the logging verbosity level (higher for more details) defaults to 1,
use -1 to log all levels.
--log-show-basename
Only show file name in output (not the leading path).
--log-show-backtrace
Show a back trace for each log message (debug builds only).
--log-show-timestamp
Show a timestamp for each log message in seconds since start.
--log-file<filepath>
Set a file to output the log to.
DebugOptions:-dor--debug
Turn debugging on.
* Enables memory error detection
* Disables mouse grab (to interact with a debugger in some cases)
* Keeps Python's 'sys.stdin' rather than setting it to None
--debug-value<value>
Set debug value of <value> on startup.
--debug-events
Enable debug messages for the event system.
--debug-ffmpeg
Enable debug messages from FFmpeg library.
--debug-handlers
Enable debug messages for event handling.
--debug-libmv
Enable debug messages from libmv library.
--debug-cycles
Enable debug messages from Cycles.
--debug-memory
Enable fully guarded memory allocation and debugging.
--debug-jobs
Enable time profiling for background jobs.
--debug-python
Enable debug messages for Python.
--debug-depsgraph
Enable all debug messages from dependency graph.
--debug-depsgraph-eval
Enable debug messages from dependency graph related on evaluation.
--debug-depsgraph-build
Enable debug messages from dependency graph related on graph construction.
--debug-depsgraph-tag
Enable debug messages from dependency graph related on tagging.
--debug-depsgraph-no-threads
Switch dependency graph to a single threaded evaluation.
--debug-depsgraph-time
Enable debug messages from dependency graph related on timing.
--debug-depsgraph-pretty
Enable colors for dependency graph debug messages.
--debug-depsgraph-uid
Verify validness of session-wide identifiers assigned to ID data-blocks.
--debug-ghost
Enable debug messages for Ghost (Linux only).
--debug-wintab
Enable debug messages for Wintab.
--debug-gpu
Enable GPU debug context and information for OpenGL 4.3+.
--debug-gpu-force-workarounds
Enable workarounds for typical GPU issues and disable all GPU extensions.
--debug-gpu-compile-shaders
Compile all statically defined shaders to test platform compatibility.
--debug-wm
Enable debug messages for the window manager, shows all operators in search, shows keymap errors.
--debug-xr
Enable debug messages for virtual reality contexts.
Enables the OpenXR API validation layer, (OpenXR) debug messages and general information prints.
--debug-xr-time
Enable debug messages for virtual reality frame rendering times.
--debug-all
Enable all debug messages.
--debug-io
Enable debug messages for I/O (Collada, ...).
--debug-fpe
Enable floating-point exceptions.
--debug-exit-on-error
Immediately exit when internal errors are detected.
--debug-freestyle
Enable debug messages for Freestyle.
--disable-crash-handler
Disable the crash handler.
--disable-abort-handler
Disable the abort handler.
--verbose<verbose>
Set the logging verbosity level for debug messages that support it.
-qor--quiet
Suppress status printing (warnings & errors are still printed).
GPUOptions:--gpu-backend
Force to use a specific GPU backend. Valid options: 'opengl' or 'vulkan' (experimental).
--gpu-compilation-subprocesses
Override the Max Compilation Subprocesses setting (OpenGL only).
MiscOptions:--open-last
Open the most recently opened blend file, instead of the default startup file.
--app-template<template>
Set the application template (matching the directory name), use 'default' for none.
--factory-startup
Skip reading the 'startup.blend' in the users home directory.
--enable-event-simulate
Enable event simulation testing feature 'bpy.types.Window.event_simulate'.
--env-system-datafiles
Set the BLENDER_SYSTEM_DATAFILES environment variable.
--env-system-scripts
Set the BLENDER_SYSTEM_SCRIPTS environment variable.
--env-system-extensions
Set the BLENDER_SYSTEM_EXTENSIONS environment variable.
--env-system-python
Set the BLENDER_SYSTEM_PYTHON environment variable.
-noaudio
Force sound system to None.
-setaudio
Force sound system to a specific device.
'None' 'Default' 'SDL' 'OpenAL' 'CoreAudio' 'JACK' 'PulseAudio' 'WASAPI'.
-cor--command<command>
Run a command which consumes all remaining arguments.
Use '-c help' to list all other commands.
Pass '--help' after the command to see its help text.
This implies '--background' mode.
-hor--help
Print this help text and exit.
/?
Print this help text and exit (Windows only).
-ror--register
Register blend-file extension for current user, then exit (Windows & Linux only).
--register-allusers
Register blend-file extension for all users, then exit (Windows & Linux only).
--unregister
Unregister blend-file extension for current user, then exit (Windows & Linux only).
--unregister-allusers
Unregister blend-file extension for all users, then exit (Windows & Linux only).
-vor--version
Print Blender version and exit.
--
End option processing, following arguments passed unchanged. Access via Python's 'sys.argv'.
ArgumentParsing:Argumentsmustbeseparatedbywhitespace,eg:
# blender -ba test.blend
...will exit since '-ba' is an unknown argument.
ArgumentOrder:Argumentsareexecutedintheordertheyaregiven.eg:
# blender --background test.blend --render-frame 1 --render-output "/tmp"
...will not render to '/tmp' because '--render-frame 1' renders before the output path is set.
# blender --background --render-output /tmp test.blend --render-frame 1
...will not render to '/tmp' because loading the blend-file overwrites the render output that was set.
# blender --background test.blend --render-output /tmp --render-frame 1
...works as expected.
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