Can't get light bulb to work

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benn
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Re: Can't get light bulb to work

Post by benn » Tue Jul 14, 2009 11:40 am

I think this lightbulb model will be going in the techniques manual. Would you be happy with that Borgleader?

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Godzilla
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Re: Can't get light bulb to work

Post by Godzilla » Tue Jul 14, 2009 12:07 pm

By the way - to anyone using the scene that I uploaded, there are also 2 emitters behind the camera and the upper left.
samlavoie.xyz

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WytRaven
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Re: Can't get light bulb to work

Post by WytRaven » Tue Jul 14, 2009 3:38 pm

benn wrote:And without the glass:
Nice jacob's ladder! :D
:idea: "A foolish consistency is the hobgoblin of little minds..." - Emerson 1841

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Polinalkrimizei
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Re: Can't get light bulb to work

Post by Polinalkrimizei » Tue Jul 14, 2009 3:48 pm

Hey Borgleader, just for the record: I cooked your original scene file overnight, and the bulb shows first signs of clearing up. So it is really just the thick glass, material-wise everything is fine.
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Light Bulb Borgleader.png
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benn
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Re: Can't get light bulb to work

Post by benn » Tue Jul 14, 2009 3:56 pm

Whats a jacobs ladder?

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Doug Armand
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Re: Can't get light bulb to work

Post by Doug Armand » Tue Jul 14, 2009 6:30 pm

benn wrote:Here are my renders:
Was this done with Godzilla's material?
Doug

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Borgleader
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Re: Can't get light bulb to work

Post by Borgleader » Tue Jul 14, 2009 7:32 pm

@benn: I'm fine with it :)

@Polinalkrimizei: ok well I'll let it cook longer then ^.^
benn hired a mercenary to kill my sig...

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WytRaven
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Re: Can't get light bulb to work

Post by WytRaven » Tue Jul 14, 2009 11:36 pm

:idea: "A foolish consistency is the hobgoblin of little minds..." - Emerson 1841

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suvakas
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Re: Can't get light bulb to work

Post by suvakas » Wed Jul 15, 2009 8:58 pm

I did a bulb scene too. Just to see if it works.
Rendered 2 days with bidir off and reached about 200k spp.
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lightBulb_1.png
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Doug Armand
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Re: Can't get light bulb to work

Post by Doug Armand » Wed Jul 15, 2009 9:11 pm

suvakas wrote:I did a bulb scene too. Just to see if it works.
Rendered 2 days with bidir off and reached about 200k spp.
I really like that nice work.

But is it just me or do none of these renders look like real clear lit lightbulbs? The filaments just doesn't seem to 'glow' like a real one. Or at least like real ones do in photographs.

And using aperture diffraction just produces wierd results with these.

Image

Image
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Polinalkrimizei
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Re: Can't get light bulb to work

Post by Polinalkrimizei » Wed Jul 15, 2009 11:27 pm

Yes we do need nice bloom and glare again in indigo!

dmn
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Re: Can't get light bulb to work

Post by dmn » Thu Jul 16, 2009 3:51 am

How about this? This was about an hour's render. I was working on this before my computer :evil: :oops: :evil: ed out. The default settings for aperture diffraction.
I found rheinard gave the quickest result, although this is Camera Tonemapping with agfacolor 200CD (I think) and I set the ISO at ~600.
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2.jpg
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Doug Armand
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Re: Can't get light bulb to work

Post by Doug Armand » Thu Jul 16, 2009 4:09 am

dmn wrote:How about this?
Thats not bad - but still doesn't have the blooming of a real photo
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dmn
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Re: Can't get light bulb to work

Post by dmn » Thu Jul 16, 2009 4:22 am

yeah but those are just default settings. can't I make it even more bloomy?

Borgleader one thing I notice about your scene is that the backdrop's color is almost black. I think this may be a major reason for the glass rendering dark?

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Doug Armand
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Re: Can't get light bulb to work

Post by Doug Armand » Thu Jul 16, 2009 4:38 am

dmn wrote:yeah but those are just default settings. can't I make it even more bloomy?

Borgleader one thing I notice about your scene is that the backdrop's color is almost black. I think this may be a major reason for the glass rendering dark?
Thats what I first thought. But a filament should easily light up all but a completely dark space - ie cat in a coal cellar.

But I agree the bgd did seem to be a big factor. I think it was decided that the glass of the bulb was too thick?
Doug

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