tachyon (1)

Tachyon Parallel/Multiprocessor Ray Tracer Version 0.98 Copyright 1994-2007, John E. Stone <[email protected]> ----------------------------------------------------------- Unrecognized parameter/option flag: --help Usage:

• tachyon/usr/bin/tachyon modelfile [options]

Model file formats supported:

• filename.dat -- The model files originated with this package. filaname.ac -- AC3D model files. filename.nff -- The NFF scene format used by Eric Haines' SPD.

Valid options: (** denotes default behaviour) ---------------------------------------------- Message Options: +V verbose messages on -V verbose messages off **

Speed Tuning Options:

-numthreads xxx

(** default is auto-determined) -nobounding

-boundthresh xxx

(** default threshold is 16)

Shading Options:

-fullshade

best quality rendering (and slowest) **

-mediumshade

good quality rendering, but no shadows

-lowshade

low quality rendering, preview (and fast)

-lowestshade

worst quality rendering, preview (and fastest)

Lighting Options:

-rescale_lights xxx rescale light intensity values by

specified factor (performed before other lighting overrides take effect)

-auto_skylight xxx

force use of ambient occlusion lighting, auto-rescaling direct light sources to compensate for ambient occlusion factor. (use value 0.7 as a good starting point)

-add_skylight xxx

force use of ambient occlusion lighting, manually-rescaling direct light sources to compensate for ambient occlusion factor. -skylight_samples xxx number of sample rays to shoot.

Specular Highlight Shading Options:

-shade_phong

Phong specular highlights

-shade_blinn

Blinn's specular highlights**

-shade_blinn_fast

fast approximation to Blinn's highlights

-shade_nullphong

disable specular highlights

Transparency Shading Options:

-trans_orig

Original implementation**

-trans_vmd

Opacity post-multiply used by VMD

Surface Normal/Winding Order Fixup Mode:

-normalfixup [off | flip | guess]

(**off is default)

Antialiasing Options:

-aasamples xxx

(maximum supersamples taken per pixel) (** default is 0, or scene file determined)

Output Options:

-res Xres Yres

override scene-defined output image size

-o outfile.tga

set output file name

-clamp

clamp pixel values to [0 to 1) (** default)

-normalize

normalize pixel values to [0 to 1)

-gamma val

normalize apply gamma correction

-format BMP

24-bit Windows BMP (uncompressed)

-format JPEG

XXX Not compiled into this binary XXX

-format PNG

24-bit PNG (compressed, lossless)

-format PPM

24-bit PPM (uncompressed)

-format PPM48

48-bit PPM (uncompressed)

-format PSD48

48-bit PSD (uncompressed)

-format RGB

24-bit SGI RGB (uncompressed)

-format TARGA

24-bit Targa (uncompressed) **

Animation Related Options:

-camfile filename.cam

Animate using file of camera positions.

-nosave

Disable writing of output frames to disk (only used for doing real-time rendering)

Copyright 1994-2007, John E. Stone <[email protected]> ----------------------------------------------------------- Unrecognized parameter/option flag: --version Usage:

• tachyon/usr/bin/tachyon modelfile [options]

Model file formats supported:

• filename.dat -- The model files originated with this package. filaname.ac -- AC3D model files. filename.nff -- The NFF scene format used by Eric Haines' SPD.

Valid options: (** denotes default behaviour) ---------------------------------------------- Message Options: +V verbose messages on -V verbose messages off **

Speed Tuning Options:

-numthreads xxx

(** default is auto-determined) -nobounding

-boundthresh xxx

(** default threshold is 16)

Shading Options:

-fullshade

best quality rendering (and slowest) **

-mediumshade

good quality rendering, but no shadows

-lowshade

low quality rendering, preview (and fast)

-lowestshade

worst quality rendering, preview (and fastest)

Lighting Options:

-rescale_lights xxx rescale light intensity values by

specified factor (performed before other lighting overrides take effect)

-auto_skylight xxx

force use of ambient occlusion lighting, auto-rescaling direct light sources to compensate for ambient occlusion factor. (use value 0.7 as a good starting point)

-add_skylight xxx

force use of ambient occlusion lighting, manually-rescaling direct light sources to compensate for ambient occlusion factor. -skylight_samples xxx number of sample rays to shoot.

Specular Highlight Shading Options:

-shade_phong

Phong specular highlights

-shade_blinn

Blinn's specular highlights**

-shade_blinn_fast

fast approximation to Blinn's highlights

-shade_nullphong

disable specular highlights

Transparency Shading Options:

-trans_orig

Original implementation**

-trans_vmd

Opacity post-multiply used by VMD

Surface Normal/Winding Order Fixup Mode:

-normalfixup [off | flip | guess]

(**off is default)

Antialiasing Options:

-aasamples xxx

(maximum supersamples taken per pixel) (** default is 0, or scene file determined)

Output Options:

-res Xres Yres

override scene-defined output image size

-o outfile.tga

set output file name

-clamp

clamp pixel values to [0 to 1) (** default)

-normalize

normalize pixel values to [0 to 1)

-gamma val

normalize apply gamma correction

-format BMP

24-bit Windows BMP (uncompressed)

-format JPEG

XXX Not compiled into this binary XXX

-format PNG

24-bit PNG (compressed, lossless)

-format PPM

24-bit PPM (uncompressed)

-format PPM48

48-bit PPM (uncompressed)

-format PSD48

48-bit PSD (uncompressed)

-format RGB

24-bit SGI RGB (uncompressed)

-format TARGA

24-bit Targa (uncompressed) **

Animation Related Options:

-camfile filename.cam

Animate using file of camera positions.

-nosave

Disable writing of output frames to disk (only used for doing real-time rendering)

The full documentation for Tachyon is maintained as a Texinfo manual. If the info and Tachyon programs are properly installed at your site, the command

• info Tachyon

should give you access to the complete manual.