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Here is a list of compile switches, used to customize Radiance code
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for specific machines and users:
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-DALIGN=(type) Alignment type, machine-dependent. Most RISC
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architectures align on 8-word boundaries (double).
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The default alignment type is int.
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-DWFLUSH=(rays) Override for number of rays before flush in rvu.
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-DBSD Operating system has a strong Berkeley flavor, which
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affects certain system calls, such as signal handling and
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resource tracking.
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-DSMLMEM The system has little RAM available, so size hash
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tables and the like accordingly. Only allows for
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small scene descriptions (32,256 primitives).
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-DSMLFLT This setting tells Radiance to use short floats
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(32 bits) throughout, which saves lots of memory
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but can cause calculation inaccuracies in many
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cases. Its use has been discontinued for this reason.
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-DSHADCACHE=N The array size to use for caching occluders.
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Setting this to 0 turns off this optimization.
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Values greater than 20 use over 4 Kbytes per
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light source, which can add up to a lot of
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memory in scenes with many sources.
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-DAVGREFL=R Set the average surface reflectance for the purpose
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of indirect irradiance calculations to R, where
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R is a real number in the range (0,1.0). The
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default value is 0.50 (50%). This value indirectly
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controls the maximum number of ambient bounces,
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which can never be more than the log of the -ad
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setting times the log of AVGREFL.
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