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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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-DMC If set, switches from default low-discrepency sequence |
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sampling to true (pseudorandom) Monte Carlo. Use if |
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the "brushed" appearance of specular highlights and |
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penumbras bothers you. |
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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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-DSPEED=(MIPS) Millions of instructions per second for this |
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processor (approximate). This is used to decide |
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certain unimportant timing issues such as how many |
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rays to trace before checking input in rvu and |
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whether or not to optimize the color table in ximage |
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on 8-bit displays. |
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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, meaning |
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that bcopy() and bzero() are present but maybe memcpy() |
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and memset() are not. (See common/standard.h for other |
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things this flag affects.) Also affects certain system |
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calls, such as signal handling and 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. |
