I wrote: > Maybe the flame plug-in is very sensitive to what random number > generator is used, and works well only with the random() function > available on most Unixes (but not in MS's C library). Problem solved. Mea culpa. It wasn't that flame would be sensitive to the random number generator's deeper statistical properties, but it did require that it returns non-negative values. I had set RAND_FUNC as g_random_int in GIMP's config.h, without thinking. The random() or lrand48() functions that normally are used on Unix both return a non-negative integer. g_random_int(), however, can return any integer. Having RAND_FUNC returning nagtive values half of the time probably can cause all kind of strange behaviour in plug-ins that use it. When I changed the definition of RAND_FUNC to: #define RAND_FUNC() g_random_int_range (0, G_MAXINT) and recompiled the flame plug-in, it behaves just like on Unix. Recompiled plug-ins that use RAND_FUNC are available in www.gimp.org/win32/updates-rand-func-plug-ins.zip. Put them in GIMP's plug-ins directory. --tml
