man vdb_render (1): ray-traces OpenVDB volumes

SYNOPSIS

vdb_render ,in.vdb out.{exr,ppm} /[,options/]

Which: ray-traces OpenVDB volumes Options:

-aperture F: perspective camera aperture in mm (default: 41.2)
-camera S: camera type; either "persp[ective]" or "ortho[graphic]" (default: perspective)
-compression S: EXR compression scheme; either "none" (uncompressed), "rle" or "zip" (default: zip)
-cpus N: number of rendering threads, or 1 to disable threading, or 0 to use all available CPUs (default: 0)
-far F: camera far plane depth (default: 3.4e+38)
-focal F: perspective camera focal length in mm (default: 50)
-fov F: perspective camera field of view in degrees (default: 44.8)
-frame F: ortho camera frame width in world units (default: 1)
-lookat X,Y,Z: rotate the camera to point to (X, Y, Z)
-name S: name of the volume to be rendered (default: render the first floating-point volume found in in.vdb)
-near F: camera near plane depth (default: 0.001)
-res WxH: image dimensions in pixels (default: 1920x1080)
-r X,Y,Z
-rotate X,Y,Z: camera rotation in degrees (default: look at the center of the volume)
-t X,Y,Z
-translate X,Y,Z: camera translation
-up X,Y,Z: vector that should point up after rotation with -lookat (default: [0, 1, 0])
-v: verbose (print timing and diagnostics)
-version: print version information and exit
-h, -help: print this usage message and exit

-color S: name of a vec3s volume to be used to set material colors
-isovalue F: isovalue in world units for level set ray intersection (default: 0)
-samples N: number of samples (rays) per pixel (default: 1)
-shader S: shader name; either "diffuse", "matte", "normal" or "position" (default: diffuse)

-absorb R,G,B: absorption coefficients (default: [0.1, 0.1, 0.1])
-cutoff F: density and transmittance cutoff value (default: 0.005)
-gain F: amount of scatter along the shadow ray (default: 0.2)
-light X,Y,Z[,R,G,B]: light source direction and optional color (default: [0.3, 0.3, 0, 0.7, 0.7, 0.7])
-scatter R,G,B: scattering coefficients (default: [1.5, 1.5, 1.5])
-shadowstep F: step size in voxels for integration along the shadow ray (default: 3)
-step F: step size in voxels for integration along the primary ray (default: 1)

: This is not (and is not intended to be) a production-quality renderer. Use it for fast previewing or simply as a reference implementation for integration into existing ray tracers.

This manual page was written by Mathieu Malaterre <[email protected]> for the Debian GNU/Linux system (but may be used by others).