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Peter Popov <pet### [at] vipbg> wrote in
news:0u5tkuoupvgafcrgfurg3g7a5btgo3sh9q@4ax.com
> I need some help with generating terrain with isosurfaces. Render
> times are intolerably slow! I am getting a max_gradient of over 25000,
> which is too high IMHO. The function in question is:
1. maybe try bluring HF map ?
2. mabye there is problem with reding this map, i.e. if it was a 16-bit
gray, *maybe* it can lead to strange results.
btw, it's a greate example for my iso-optimization future ;)
--
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M
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