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.\" RCSid "$Id$" |
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.TH RTPICT 1 3/19/2018 RADIANCE |
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.SH NAME |
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rtpict - generate a RADIANCE picture or layerd image using rtrace |
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rtpict - generate a RADIANCE picture or layered image using rtrace |
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.SH SYNOPSIS |
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.B rtpict |
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.B "-n nproc" |
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.sp |
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.nf |
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v radiance.hdr |
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r mirrored.hdr |
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x unmirrored.hdr |
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l effective.dpt |
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L firstsurface.dpt |
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R mirrored.dpt |
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X unmirrored.dpt |
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r r_refl.hdr |
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x r_unrefl.hdr |
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l d_effective.dpt |
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L d_firstsurf.dpt |
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R d_refl.dpt |
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X d_unrefl.dpt |
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n perturbed.nrm |
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N unperturbed.nrm |
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s surface.idx |
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.I rcode_depth(1), |
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and the |
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.I \-d |
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option should be used to assign the reference (median) depth and units. |
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option should be used to assign the reference (median) depth and world |
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units, which applies to the overall scene. |
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Surface normals (from the 'n' and 'N' types) will be converted |
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to a 32-bit representation by |
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.I rcode_normal(1). |
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.I "irradiance.hdr" |
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and some other output types become irrelevant (i.e., 'r', 'x', 'R', and 'X'). |
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If one or more of the associated output files already exists in the |
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destination directory, it will be overwritten with the new data. |
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destination directory, an error will be printed and the command will abort. |
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.SH EXAMPLES |
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To render a scene with four processes: |
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.IP "" .2i |
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To render radiance, first surface distance, and normals in a layered image: |
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.IP "" .2i |
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rtpict -n 8 -vf fish.vf @render.opt -ovLn fisholay scene.oct |
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.SH NOTES |
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Users should seriously consider using |
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.I rpiece(1) |
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when irradiance caching is employed with a shared ambient file. |
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If |
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.I rtpict |
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is used in multiprocessing mode with a shared irradiance cache, |
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it is trying to compute almost |
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the same part of the same scanline in different processes, which |
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results in many redundant calculations. |
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The |
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.I rpiece |
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program avoids this by working on separate tiles in each |
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process, with less overlap in the indirect irradiance calculation. |
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Either program will benefit from an "overture" run of a |
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single-process rpict to create the ambient file using a low-resolution |
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rendering that is discarded, but this will not completely solve the |
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problem for |
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.I rtpict. |
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.SH AUTHOR |
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Greg Ward |
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.SH "SEE ALSO" |
