.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.8.
.TH TACHYON-NOX "1" "December 2018" "Tachyon (Debian 0.99~b6+dsx-9)" "Tachyon Manual"
.SH NAME
tachyon-nox \- parallel/multiprocessor ray tracer with no X support
.SH SYNOPSIS
.B tachyon-nox
\fI\,modelfile \/\fR[\fI\,options\/\fR]
.SH DESCRIPTION
Valid options and accepted formats are as follows (** denotes default behaviour).
.SS "Model file formats supported:"
.TP
filename.dat
the model files originated with this package
.TP
filaname.ac
AC3D model files
.TP
filename.nff
the NFF scene format used by Eric Haines' SPD
.SS "Message Options:"
.TP
+V
verbose messages on
.TP
\fB\-V\fR
verbose messages off **
.SS "Speed Tuning Options:"
.TP
\fB\-raydepth\fR xxx
maximum ray recursion depth
.TP
\fB\-numthreads\fR xxx
(** default is auto\-determined)
.HP
\fB\-nobounding\fR
.TP
\fB\-boundthresh\fR xxx
(** default threshold is 16)
.SS "Shading Options:"
.TP
\fB\-fullshade\fR
best quality rendering (and slowest) **
.TP
\fB\-mediumshade\fR
good quality rendering, but no shadows
.TP
\fB\-lowshade\fR
low quality rendering, preview (and fast)
.TP
\fB\-lowestshade\fR
worst quality rendering, preview (and fastest)
.SS "Lighting Options:"
.TP
\fB\-rescale_lights\fR xxx rescale light intensity values by
specified factor (performed before other
lighting overrides take effect)
.TP
\fB\-auto_skylight\fR 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)
.TP
\fB\-add_skylight\fR xxx
force use of ambient occlusion lighting,
manually\-rescaling direct light sources to
compensate for ambient occlusion factor
.HP
\fB\-skylight_samples\fR xxx number of sample rays to shoot
.SS "Specular Highlight Shading Options:"
.TP
\fB\-shade_phong\fR
Phong specular highlights
.TP
\fB\-shade_blinn\fR
Blinn's specular highlights **
.TP
\fB\-shade_blinn_fast\fR
fast approximation to Blinn's highlights
.TP
\fB\-shade_nullphong\fR
disable specular highlights
.SS "Transparency Shading Options:"
.TP
\fB\-trans_max_surfaces\fR xxx
limit the number of transparent
surfaces shown to the number specified
.TP
\fB\-trans_orig\fR
original implementation **
.TP
\fB\-trans_raster3d\fR
Raster3D angle\-based opacity modulation
.TP
\fB\-trans_vmd\fR
opacity post\-multiply used by VMD
.SS "Transparent Surface Shadowing Options:"
.TP
\fB\-shadow_filter_on\fR
transparent objects cast shadows **
.TP
\fB\-shadow_filter_off\fR
transparent objects do not cast shadows
.SS "Fog Shading Options:"
.TP
\fB\-fog_radial\fR
radial fog implementation **
.TP
\fB\-fog_vmd\fR
planar OpenGL\-like fog used by VMD
.SS "Surface Normal/Winding Order Fixup Mode:"
.HP
\fB\-normalfixup\fR [off|flip|guess] (** off is default)
.SS "Antialiasing Options:"
.TP
\fB\-aasamples\fR xxx
maximum supersamples taken per pixel
(** default is 0, or scene file determined)
.SS "Output Options:"
.TP
\fB\-res\fR Xres Yres
override scene\-defined output image size
.TP
\fB\-o\fR outfile.tga
set output file name
.TP
\fB\-clamp\fR
clamp pixel values to [0 to 1) **
.TP
\fB\-normalize\fR
normalize pixel values to [0 to 1)
.TP
\fB\-gamma\fR val
normalize apply gamma correction
.TP
\fB\-format\fR BMP
24\-bit Windows BMP (uncompressed)
.TP
\fB\-format\fR JPEG
24\-bit JPEG        (compressed, but lossy)
.TP
\fB\-format\fR PNG
24\-bit PNG         (compressed, lossless)
.TP
\fB\-format\fR PPM
24\-bit PPM         (uncompressed)
.TP
\fB\-format\fR PPM48
48\-bit PPM         (uncompressed)
.TP
\fB\-format\fR PSD48
48\-bit PSD         (uncompressed)
.TP
\fB\-format\fR RGB
24\-bit SGI RGB     (uncompressed)
.TP
\fB\-format\fR TARGA
24\-bit Targa       (uncompressed) **
.SS "Animation Related Options:"
.TP
\fB\-camfile\fR filename.cam
animate using file of camera positions
.TP
\fB\-nosave\fR
disable writing of output frames to disk
(only used for doing real\-time rendering)
.SS "Interactive Spaceball/SpaceNavigator Control:"
.TP
\fB\-spaceball\fR
enable Spaceball/SpaceNavigator camera flight
.HP
\fB\-spaceballport\fR serialportdevicename (only for serial devices)
.SS "Getting Help:"
.TP
\fB\-help\fR
display help message and exit
.TP
\fB\-version\fR
display version string and exit
.TP
\fB\-banner\fR
display banner and exit