I'm trying to put non-CSG'able objects in water, and, with radiosity lighting,
they come out too dark.  I'm guessing this is because the water is in the same
space as the objects themselves.

Any ideas?

Thanks

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JH napsal(a):
> I'm trying to put non-CSG'able objects in water, and, with radiosity lighting,
> they come out too dark.  I'm guessing this is because the water is in the same
> space as the objects themselves.
> 
> Any ideas?
> 
> Thanks
> 
> 
> 
if you use conventional light sources you need to make it (from simlest 
to slowest):
-shadowless
or
-cast fake caustics
or
-cast pohotons
or
-make the light source a small highly ambient sphere (and crank up the 
count)
also remember that media doesn't gather radiosity samples.

-- 
the ultimate time-killer:
+a0.0 +am2 +r9

Johnny D

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Jan Dvorak <jan### [at] centrumcz> wrote:
> JH napsal(a):
> > I'm trying to put non-CSG'able objects in water, and, with radiosity lighting,
> > they come out too dark.  I'm guessing this is because the water is in the same
> > space as the objects themselves.
> >
> > Any ideas?
> >
> if you use conventional light sources you need to make it (from simlest
> to slowest):

The scene works fine with conventional light sources.  The problem is
with radioisty.  Everything in the water comes out too dark.

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JH nous apporta ses lumieres en ce 2008/02/24 13:42:
> Jan Dvorak <jan### [at] centrumcz> wrote:
>> JH napsal(a):
>>> I'm trying to put non-CSG'able objects in water, and, with radiosity lighting,
>>> they come out too dark.  I'm guessing this is because the water is in the same
>>> space as the objects themselves.
>>>
>>> Any ideas?
>>>
>> if you use conventional light sources you need to make it (from simlest
>> to slowest):
> 
> The scene works fine with conventional light sources.  The problem is
> with radioisty.  Everything in the water comes out too dark.
> 
> 
> 
> 
When tou need to cross a transparent surface, it count as a recursion step. If 
recursion_limit is set to 1, the radiosity sampling stop on the down face of 
your water. Try increasing recursion_limit by 1 or 2.
You can't use a two pass technique and remove that surface as it's an active 
surface.

-- 
Alain
-------------------------------------------------
Creationism: God made all shit.

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> >>> I'm trying to put non-CSG'able objects in water, and, with radiosity lighting,
> >>> they come out too dark.  I'm guessing this is because the water is in the same
> >>> space as the objects themselves.
> >>>
> >>> Any ideas?

> When tou need to cross a transparent surface, it count as a recursion step. If
> recursion_limit is set to 1, the radiosity sampling stop on the down face of
> your water. Try increasing recursion_limit by 1 or 2.
> You can't use a two pass technique and remove that surface as it's an active
> surface.

Aha.  The water is inside a glass, and recurion_limit was 2.  I'm
trying the scene at 4 now (because the render wasn't slow enough
before...!)

Thanks!

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JH napsal(a):
>>>>> I'm trying to put non-CSG'able objects in water, and, with radiosity lighting,
>>>>> they come out too dark.  I'm guessing this is because the water is in the same
>>>>> space as the objects themselves.
>>>>>
>>>>> Any ideas?
> 
>> When tou need to cross a transparent surface, it count as a recursion step. If
>> recursion_limit is set to 1, the radiosity sampling stop on the down face of
>> your water. Try increasing recursion_limit by 1 or 2.
>> You can't use a two pass technique and remove that surface as it's an active
>> surface.
> 
> Aha.  The water is inside a glass, and recurion_limit was 2.  I'm
> trying the scene at 4 now (because the render wasn't slow enough
> before...!)
> 
> Thanks!
> 
> 
> 
> 
This means:
-water in
-glass out
-glass in
-surface
?

-- 
You know you've been raytracing too long when...
you ever saw a beautiful scenerey and regretted not to take your 6" 
reflective ball and a digital camera, thinking "this would have been a 
perfect light probe"
-Johnny D

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> > Aha.  The water is inside a glass, and recurion_limit was 2.  I'm
> > trying the scene at 4 now (because the render wasn't slow enough
> > before...!)
> >
> > Thanks!
> >
> >
> >
> >
> This means:
> -water in
> -glass out
> -glass in
> -surface
> ?

You're saying 4 isn't enough?  Or too much?  Or just right?

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JH nous apporta ses lumieres en ce 2008/02/24 16:55:
>>> Aha.  The water is inside a glass, and recurion_limit was 2.  I'm
>>> trying the scene at 4 now (because the render wasn't slow enough
>>> before...!)
>>>
>>> Thanks!
>>>
>>>
>>>
>>>
>> This means:
>> -water in
>> -glass out
>> -glass in
>> -surface
>> ?
> 
> You're saying 4 isn't enough?  Or too much?  Or just right?
> 
> 
> 
> 
You may need to push it up to 5, if you need the radiosity to go trough the 
glass and acount for whatever's on the other side.
If 4 give you acceptable results, then stay with that.

-- 
Alain
-------------------------------------------------
"Sure, everyone's in favor of saving Hitler's brain, but when you put it into 
the body of a great white shark, suddenly you're a madman." 
             --Futurama

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> >>> Aha.  The water is inside a glass, and recurion_limit was 2.  I'm
> >>> trying the scene at 4 now (because the render wasn't slow enough
> >>> before...!)
> >>> ....
> > You're saying 4 isn't enough?  Or too much?  Or just right?
> >
> You may need to push it up to 5, if you need the radiosity to go trough the
> glass and acount for whatever's on the other side.
> If 4 give you acceptable results, then stay with that.

This did the trick!  Thank you.  The darkness inside the water has
been nagging at me for days.

4 is enough.  I really just need the stuff inside the water not to be
dark.  Upping the recursion made the render much slower, but it was
worth it.

Again, thanks.

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