tachyon1

Parallel ray-tracer

Overview

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)

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