tachyon - Man Page
Parallel/Multiprocessor Ray Tracer
Synopsis
tachyon modelfile [options]
Description
Tachyon is designed to be a very fast renderer, based on ray tracing, and employing parallel processing to achieve high performance. NOTE: ** denotes default behaviour below.
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.
Message Options
+V verbose messages on
-V verbose messages off **
Speed Tuning Options
- -raydepth xxx
(maximum ray recursion depth
- -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_maxdist xxx AO maximum occlusion distance cutoff.
-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_max_surfaces xxx
Limit the number of transparent surfaces shown to the number specified
- -trans_orig
Original implementation**
- -trans_raster3d
Raster3D angle-based opacity modulation
- -trans_vmd
Opacity post-multiply used by VMD
Transparent Surface Shadowing Options
- -shadow_filter_on
Transparent objects cast shadows **
-shadow_filter_off Transparent objects do not cast shadows
Fog Shading Options
- -fog_radial
Radial fog implementation **
- -fog_vmd
Planar OpenGL-like fog 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
24-bit JPEG (compressed, but lossy)
- -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
Copyright 1994-2022, John E. Stone <john.stone@gmail.com>
Referenced By
The man page tachyon-ogl(1) is an alias of tachyon(1).