Feature requests, bug reports and related discussion
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ortega
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by ortega » Fri Aug 24, 2007 3:35 am
Well ... im trying make a scene with env. map + emitter, but when a do render with emitter the env. map do dark ... buuuut when i turn emitter off he work ... look the examples and sry about my english
Emiiter ON + Env. MAP
Emitter OFF + Env. MAP
btw...its the second time with same problem
thx
I use, Indigo_v09_test06 + Blendigo 9 s2

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Kram1032
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by Kram1032 » Fri Aug 24, 2007 3:42 am
that's 'cause you use reinhard tonemapping... (reinhard auto exposures your pic as good as possible, it tries to avoid pure black and pure white pixels)
two ways to get arround that:
1) make your emitter weaker (don't turn it completely off, but make it weaker)
2) use linear tonemapping - a bit harder to use than reinhard, but as long as you export the igi and you can post edit the tonemapping in violet, you shouldn't have troubles with that

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Zom-B

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by Zom-B » Fri Aug 24, 2007 3:44 am
its an tonemapping issue!
Black Body is sooooo bright that much more bright could not go!
So use efficiacy_scale for your meshlights, but finding the right values is a try & error work.
You also could try to reduce your Black_body gain value massively!
polygonmanufaktur.de
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SmartDen

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by SmartDen » Fri Aug 24, 2007 3:54 am
Just raise Env map gain
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zsouthboy
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by zsouthboy » Fri Aug 24, 2007 4:12 am
Smartden hit the nail on the head.
Just increase your Env map gain. by 10x or more

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SmartDen

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by SmartDen » Fri Aug 24, 2007 4:27 am
zsouthboy wrote:Smartden hit the nail on the head.
Just increase your Env map gain. by 10x or more

5 or 7 should be enough too. Just try out!
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ortega
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by ortega » Fri Aug 24, 2007 10:19 am
THX guys

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Marcofly
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by Marcofly » Fri Aug 24, 2007 7:59 pm
since when can you use env.maps +emitter? did i miss something?
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OnoSendai

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by OnoSendai » Fri Aug 24, 2007 9:42 pm
Since always

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Marcofly
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by Marcofly » Fri Aug 24, 2007 10:22 pm
uh oh..
tnx Nick!

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ortega
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by ortega » Fri Aug 24, 2007 11:38 pm
how is better? only emitters? thx
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SmartDen

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by SmartDen » Sat Aug 25, 2007 12:15 am
ortega wrote:how is better? only emitters? thx
Try both, emitters and EXR. With emitter you can get good shadows and EXR give you nice revlections
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deltaepsylon
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by deltaepsylon » Sat Aug 25, 2007 12:17 am
I guess its better with only emitters. BUT (and its a big but) only if you add some other low power emitters (perhaps 2) around the model, i mean like long rectangular boxes so that you dont get 2 funky shadows. that way, the scene will still be bright, but you will still see the headlamp thing.
-OR-
you could go for a nice smokey.foggy effect and put the whole thing in a giant SSS cube and see the headlamp from the model illuminate a cone of light, that'd be pretty kewl
mind uploading the blend file? id like to take a closer look at that thing, looks interesting

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deltaepsylon
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by deltaepsylon » Sat Aug 25, 2007 2:59 am
kewl, tahnks
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