Glass red...?

[Ryouta Sumeragi]

Hi,

It reddens when Cauchy B Coefficent is used in the MLT mode...
Is my setting bad?
Is there a good method?


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C4D User
Win xp or Vista (32bit), Core2 Quad, 4GB RAM

[Meelis]

Hi

http://en.wikipedia.org/wiki/Dispersion_%28optics%29

And use supersamples 2+ for anti-aliasing.

[Ryouta Sumeragi]

Thanks Meelis!

I read Wikipedia...
It seems to be difficult for me.

Cauchy of Glass was made from 0.005 to 0.010, and Water was adjusted to about 0.005.
However, a glass is red in MLT.
PT looks good...


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Cindigo 2.2 Stable + Indigo 2.2.11
Win xp or Vista (32bit), Core2 Quad, 4GB RAM

[PureSpider]

I think the reddish tint definitely IS a bug, my glasses in my cupboard don't turn red just because they are dispersing light...
In addition, MLT has some other weirdnesses, too since a few releases...

[dakiru]

Hi!

Did you try MLT+BiDir [SSF=2]? This combination works for me the best in most of the cases.

[PureSpider]

Compare to this post; maybe this is the same issue?

[Ryouta Sumeragi]

Compare to this post; maybe this is the same issue?

It looks like...
I met with the same phenomenon with 1.1.18 before, too.
I remember that I confirmed it only in MLT+BiDir then.

[Ryouta Sumeragi]

Hi!

Did you try MLT+BiDir [SSF=2]? This combination works for me the best in most of the cases.

!!

[ZYX]

[Jambert]

Hi!
Did you try MLT+BiDir [SSF=2]? This combination works for me the best in most of the cases.

+1

So don't understand last render??? Precedence?!

[Meelis]

Is the glass and water % different, like glass 9 and water 8.
Are there doubles with 0,1mm?

[Ryouta Sumeragi]

Hi!
Did you try MLT+BiDir [SSF=2]? This combination works for me the best in most of the cases.

+1

So don't understand last render??? Precedence?!

Is the glass and water % different, like glass 9 and water 8.
Are there doubles with 0,1mm?

Oh...
The last result was both 10.

I am trying it in Glass9 and Water8 now.
But I am becoming the same result...

I used Precedence only in fog and dust.
It did not know the parameter to be necessary even in this case...

[Ryouta Sumeragi]

I attach C4D scene file just to make sure...

[Meelis]

All intersecting mediums need to have different %.
Glass hiest, next water, fog lowest.

Maybe u have inside fog cube some glass. There is intersecting, where is glass can't be fog - hier % glass takes over the area where 2 ore more mediums intersect. It may never be same % if they intersect.

[fused]

I attach C4D scene file just to make sure...

okay, had a look at it.... either make your emitting mesh a closed volume (eg so it has a thickness) or change the emittion material to anything else than specular or glossy transparent (best would be total black diffuse).

all objects that have a material applied that takes a media (specular glossy transparen) have to be closed volumes with normals facing the right direction or you will run into weird issues like this.