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[solved]....white dots in Rendering
Posted: Wed Feb 27, 2008 5:49 pm
by jurX
That happens the first time, since a long time,....but in this Project I get white dots in the Render.....for testing the glass has no ior settings....and the only light source is the physical sun,....thats it.
This is really strange.Have somebody an idea what that could be,....?
cu jurX
Posted: Wed Feb 27, 2008 7:17 pm
by mverta
What do you mean the glass has "no IOR settings?"
_Mike
Posted: Wed Feb 27, 2008 8:15 pm
by Fernando Tella
I would say those are caustics. As it is a thin object I would add a ghost layer to let light go faster through it.
Posted: Wed Feb 27, 2008 8:25 pm
by Mihai
Yup those look like caustics.
Posted: Wed Feb 27, 2008 8:44 pm
by Bubbaloo
Seeing that you probably don't need refraction on that piece, I would use ags. Otherwise it will take a long time for that area to fill in with light.
Posted: Thu Feb 28, 2008 9:31 am
by jurX
Seeing that you probably don't need refraction on that piece
thats the point....this glass has no refraction!...
Posted: Thu Feb 28, 2008 11:04 am
by tom
Can you provide the material settings for that glass?
Posted: Thu Feb 28, 2008 11:41 am
by jurX
...for sure
Posted: Thu Feb 28, 2008 2:55 pm
by jurX
I fixed it!The Problem was a poly-plane which was laying direct on the canopy-geometrie.And it was in the canopy-object-group in MWST...so I oversaw it. That one has an other glass-material...I kill that one,....now it works as it should,...I forgot to delete this poly-plane after exporting the scene from cinema....sorry guys for waisting your time.
Posted: Thu Feb 28, 2008 5:54 pm
by mtripoli
I have a quick question for my own education; in the MXM it shows an Nd of 1.00. Isn't that air? Shouldn't it be higher than 1.00 to be - anything other than air?
Posted: Thu Feb 28, 2008 5:57 pm
by Bubbaloo
For a transparent material, anything over 1.00 refracts light and will take longer to render.
Posted: Thu Feb 28, 2008 6:01 pm
by Maximus3D
Even air refracts, although it's very very little. So little it's normally set to 1.0. But i'm gonna be a real nerd now and post the air ior value below.
Air 1.0002926
/ Max
Posted: Thu Feb 28, 2008 6:20 pm
by Bubbaloo
Unless you're in L.A. then it jumps to about 1.2...
Posted: Thu Feb 28, 2008 7:33 pm
by def4d
so it is caustic!
Posted: Thu Feb 28, 2008 8:08 pm
by w i l l
Bubbaloo wrote:Unless you're in L.A. then it jumps to about 1.2...
Or possibly 30 on a hot day.