Man1 - blender.1

-b or –background

Run in background (often used for UI-less rendering).

-a or –render-anim

Render frames from start to end (inclusive).

-S or –scene <name>

Set the active scene <name> for rendering.

-f or –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).

-s or –frame-start <frame>

Set start to frame <frame>, supports +/- for relative frames too.

-e or –frame-end <frame>

Set end to frame <frame>, supports +/- for relative frames too.

-j or –frame-jump <frames>

Set number of frames to step forward after each rendered frame.

-o or –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:

-E or –engine <engine>

Specify the render engine.
Use ’-E help’ to list available engines.

-t or –threads <threads>

Use amount of <threads> for rendering and other operations
[1-1024], 0 for systems processor count.

-F or –render-format <format>

Set the render format.
Valid options are:

Formats that can be compiled into Blender, not available on all systems:

-x or –use-extension <bool>

Set option to add the file extension to the end of the file.

-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).

-w or –window-border

Force opening with borders.

-W or –window-fullscreen

Force opening in fullscreen mode.

-p or –window-geometry <sx> <sy> <w> <h>

Open with lower left corner at <sx>, <sy> and width and height as <w>, <h>.

-M or –window-maximized

Force opening maximized.

-con or –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.

-y or –enable-autoexec

Enable automatic Python script execution.

-Y or –disable-autoexec

Disable automatic Python script execution (pydrivers & startup scripts), (compiled as non-standard default).

-P or –python <filename>

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.

–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 <filename>

Set a file to output the log to.

-d or –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-uuid

Verify validness of session-wide identifiers assigned to ID datablocks.

–debug-ghost

Enable debug messages for event handling.

–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-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.

–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.

–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 BLENDER_STARTUP_FILE 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-python

Set the BLENDER_SYSTEM_PYTHON environment variable.

-noaudio

Force sound system to None.

-setaudio

Force sound system to a specific device.

-h or –help

Print this help text and exit.

/?

Print this help text and exit (Windows only).

-R

Register blend-file extension, then exit (Windows only).

-r

Silently register blend-file extension, then exit (Windows only).

-v or –version

Print Blender version and exit.

--

End option processing, following arguments passed unchanged. Access via Python’s ’sys.argv’.

–debug-freestyle

Enable debug messages for Freestyle.

argument.

’/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.