Indigo 0.9 test 8

General News and accouncements regarding the Indigo render engine
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matsta
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Post by matsta » Mon Oct 08, 2007 11:37 pm

i get similar problems when comparing t7 and t8 renders. esp with light intensity/direction. an example is this...
Attachments
im1191771408.png
t7
im1191771408.png (771.31 KiB) Viewed 3941 times
im1191835463.png
t8
im1191835463.png (586.73 KiB) Viewed 3941 times

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Kram1032
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Post by Kram1032 » Mon Oct 08, 2007 11:40 pm

:shock: When did you do that test? It's great!
Even if t8 is quite overexposured, it looks superior, especially, where you have that volumetric shadow of the small ball inside the big one :D

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matsta
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Post by matsta » Mon Oct 08, 2007 11:49 pm

hey kram

just a quick test i did for fog. here it is if u interested :P :
Attachments
foggy.zip
.blend
(107.15 KiB) Downloaded 216 times

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Kram1032
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Post by Kram1032 » Mon Oct 08, 2007 11:50 pm

thanks :)
yeah, that's really a great test for the four things, fog, participating media, precedence and caughy_b_coeff :D

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matsta
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Post by matsta » Mon Oct 08, 2007 11:51 pm

glad u like ;)

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Zom-B
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Post by Zom-B » Tue Oct 09, 2007 4:57 am

since 09.t8 I had some strange issue that (some of) my renderings become totally black after getting displayed accurate first in the indigo viewport :shock:

Can somebody confirm this?

I'll try to do a reduced scene that has this issue tonight...
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Kram1032
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Post by Kram1032 » Tue Oct 09, 2007 5:45 am

uhm, did you look in the post, before this one, ZomB?

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Zom-B
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Post by Zom-B » Tue Oct 09, 2007 10:37 am

Kram1032 wrote:uhm, did you look in the post, before this one, ZomB?
Yes I did...

Only Using linear tonemapping could bright up such scenes...
(only older Violet versions can tonemap this igi's!)

Also the IGI is about 1/4 of the one without this issue (21.9MB vs. 5.49MB), what means there are less color information (!!?).

This Issue seems to be light or material thing, because this scene rendered fine before I added some materials and lights...

only rgb lights are used, and 2 rgb light texture emitters.... but I got this issue with another scene that uses only BlackBody for lightning!

Here the zipped igi file (25 min rendering!).
Attachments
car_tonemapped.jpg
25 min rendering linear tonemapped in VioletR12P1b3.
car_tonemapped.jpg (309.44 KiB) Viewed 3798 times
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Zom-B
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Post by Zom-B » Tue Oct 09, 2007 3:11 pm

Hmm... you can see it in the "rendering" above the grey plane sorounded by lot of light bulbs.

The Problem is, that both meshes got the same light settings :shock:
So why do the got different brighntness? I did some testing:

RGB Light 1 1 1 - Efficacy Scale: Power drawn 95, Overall luminous efficacy 14

No Background lightning, Reinhard 3/1/10, D65
Attachments
im1191896464.png
Using no Efficacy Scale or merging all 4 meshes together causes this result
im1191896464.png (312.11 KiB) Viewed 3760 times
im1191896576.png
Same light settings for all 4 meshes!
im1191896576.png (297.29 KiB) Viewed 3759 times
light_issue.zip
The Exported igs + meshes + C4D Scene file
(1.1 MiB) Downloaded 189 times
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zsouthboy
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Post by zsouthboy » Wed Oct 10, 2007 1:36 am

@ZomB:

I believe that is correct result: the larger surface area with the same light output as the smaller surface area appears darker per pixel of the output image.

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Post by StompinTom » Wed Oct 10, 2007 1:36 am

your light power difference could be because the planes have a much greater surface area than the bulbs around them.

power\bigger surface area=less output per unit area. and vice versa.

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Kram1032
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Post by Kram1032 » Wed Oct 10, 2007 4:12 am

The efficacy scale doesn't give the relative energy amount / meter but the absolute one! It will get divided through the area.
To get similar results, you need to re-multiply/-divide the values with the area.

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Zom-B
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Post by Zom-B » Wed Oct 10, 2007 8:52 pm

Kram1032 wrote:The efficacy scale doesn't give the relative energy amount / meter but the absolute one! It will get divided through the area.
To get similar results, you need to re-multiply/-divide the values with the area.
Thanks for pointing this out guys... learned something new today :wink:
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Xman
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Post by Xman » Wed Oct 10, 2007 9:55 pm

WoW~~ :shock: Great work..................
I believe firmly you are"physics- engine"emperor.
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CoolColJ
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Post by CoolColJ » Wed Oct 10, 2007 10:34 pm

can't get the metadata dump to work - Indigo keeps spitting an error

like this?

G:\Renderers\INDIGO\indigo_09_test4\indigo.exe --dumpmetadata G:\Renderers\INDIGO\indigo_09_test4\renders\im1191900795.png

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