RTPICT(1)

NAME
rtpict - generate a RADIANCE picture using rtrace

SYNOPSIS
rtpict -n nproc [ rpict options ] [ @file ] octree

DESCRIPTION
Rtpict is a script that generates a picture from the RADIANCE scene given in octree and sends it to the standard output, or to a file specified with the -o option. Most options and defaults are the same as rpict(1), although a few switches are silently ignored. Options incompatible with multi-processing can generate an error.

The rtrace(1) tool is called with vwrays(1) to perform the actual work. This enables the -n option for multiprocessing on platforms that support it. If the -n option is not specified or is set to 1, then rpict is called directly. There is no benefit in setting the number of processes to anything greater than the number of virtual cores available on your machine. Also, it is very important to set the -af option if an irradiance cache is being generated; otherwise, your speed-up will be far from linear.

EXAMPLE
To render a scene with four processes:

    rtpict -n 4 -vf mypers.vf -ab 1 -af scene.amb scene.oct > scene_pers.hdr

AUTHOR
Greg Ward

SEE ALSO
getinfo(1), lookamb(1), mkpmap(1), oconv(1), pdfblur(1), pfilt(1), pinterp(1), pmblur(1), printf(3), ra_rgbe(1), rad(1), rpiece(1), rpict(1), rtrace(1), rvu(1) vwrays(1),