fireflies in 1.5

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fireflies in 1.5

Post  wayne on Sat May 15, 2010 11:32 pm

Hi All,

firstly, thanks for this forum, the fact that demo users cant use the official forum is pathetic.

i just downloaded the fry 1.5 demo, using it with modo 401 sp4

i'm getting a large amount of fireflies in refractive materials, a huge problem...
i let these renders go for at least an hour, but they wont dissapear.

any ideas? hopefully i'm doing something wrong.




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Re: fireflies in 1.5

Post  javigon on Tue May 18, 2010 10:17 am

these artifacts looks like power exceed or lighting problems.
Check your lights doné intersect with noting and dielectric material have a thin closed volume.
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Re: fireflies in 1.5

Post  wayne on Tue May 18, 2010 10:37 am

hey javigon,

i'm using sun/sky for lighting in both shots.. all default settings really

the teapot might not be a closed surface, but the cube most certainly is

according to fryrender staff "instead of artifacts we prefer to say 'very long to converge caustics-through-dielectrics' "

it is an actual limitation with unbiased engines Sad

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Re: fireflies in 1.5

Post  javigon on Tue May 18, 2010 10:42 am

jaja.. artifacts are artifacts!
Ok. sun + dielectrics= problems.
Actually this is a problem with a unbiased render engine. Try to not use sun. ( only sky or an emiter)
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Re: fireflies in 1.5

Post  jorari71 on Thu May 20, 2010 7:53 pm

Anyway, you could send to us your scene in order to solve your problems.

It's true that with "ghost" transparency you won't get difraction but I'd like to take a view of your scene. Meanwhile you could make a test with ghost transparency.

The problem is that I'm very busy right now...Maybe in a month or so...I'm sorry very much.

Anyway, thanks for writing here.

Best regards.
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Re: fireflies in 1.5

Post  javigon on Thu May 20, 2010 8:01 pm

Ghost is a "fake glass". Only must be used in simple plane without thikness
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