i tried shadow maps quite often but didnt had success so far. main
reason was that i had to rais the size so much to get a clea shadow
that the rendertimes where way higher than raytraced and sometimes
area shadows.
i just tried again but this time i finally figured it out i think.
maybe it can help you too. i think its trival but you never know.
i made a test with the spot about 500units away covering a fairly big
area.
the solution to get a non flickering shadow map is the combination of
size, softness and samples! one alone doesnt do any good.
i could lower the size to 500 and got of course ugly blotchy shadows.
upping the softness gets rid of these blocks, but leaves us with
flicker. and that you can erease with the samples. like bernard said
64 or even higer!
with a shadow map of 1000 the rendtime rises but the shadow works
perfect!
did i said already that i love this list? it makes me solving things i
didnt asked for:)
kim, i ususally try to get my lower sampling number down to 0 and try
to offset the loss of detail with a lower sampling threshold. i found
this to be a very nice speedup in areas that are black or dont have
details. the lower threshold will pick up the details and raise the
sampling only when its needed. i am sure you know that, just saying
that in most cases i can get away with 0 instead of 1 in the min
samples.
ciao
franky
Wednesday, May 31, 2006, 11:41:36 PM, you wrote:
ka> you'd be surprised at what some people think are good antialiasing settings.
ka> care to share numbers?
ka> -----Original Message-----
ka> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of
ka> Helen Bucknall
ka> Sent: 31 May 2006 18:38
ka> To: XSI(at)Softimage.COM
ka> Subject: Re: shadow flicker
ka> Just using 1024 res and sample 20. And bog standard antialiasing.
ka> ---
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