Many new light materials

General discussion about Indigo Materials - material requests, material developement, feedback, etc..
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Frank Schroer
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Re: Many new light materials

Post by Frank Schroer » Thu Feb 04, 2010 10:33 pm

Hello
oll the Light-Mats dont work in Cinema 4D R 11.5!!
I have the aktuell Programmversions.
At the "Blue LED" my PC crashed completely. :evil:

I can the parameter "Start wellenlänge" set at zero-- the the renderer beginn,
but then all the colors are gone :cry:

What can i do? here my Preferences:
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wrong-Lights.jpg
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Regards,
Frank

http://www.cycot.de
Indigo 3.2.2 | Cindigo 3.2.1 | C4D R13 | PC, Win Visa, I7QuadCore, 6Gig Ram

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fused
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Re: Many new light materials

Post by fused » Thu Feb 04, 2010 10:53 pm

Hm, yes I already heared about this. Investigating...

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galinette
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Re: Many new light materials

Post by galinette » Fri Feb 05, 2010 12:05 am

Is it possible to use linked IGM's in C4D? Like in Skindigo?

If yes, that may solve your issue. There is a bug in Indigo with emitter spectra and number format, if I can remember entering 4E-7 works and 0.4E-6 does not (strange). I believe that C4D is rewriting the material code, but if you use a linked IGM it may not.

Etienne
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Polinalkrimizei
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Re: Many new light materials

Post by Polinalkrimizei » Fri Feb 05, 2010 12:38 am

Danger of simple linear interpolation is that you can dramatically change the peak areas for peaky spectras, which then ends up in a sensible change in color.
I tried the candle-material again, cause to me it looks different than expected.
First picture is based on fused's code, second one is galinette's, both use "E" as whitebalance. Third one is second one with different tonemapping and light layer adjustments, custom whitebalance.
Just to illustrate the dramatic change of color. Which is really quite dramatic. Dougal, please double-check before defining presets! Cause it is really the coolest idea to have them working in blendigo!
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candle 1 E.jpg
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candle 2 E.jpg
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Candle tweaked.jpg
Candle tweaked.jpg (164.64 KiB) Viewed 2093 times

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galinette
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Re: Many new light materials

Post by galinette » Fri Feb 05, 2010 3:35 am

I will try to redo a spectrum from scratch

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galinette
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Re: Many new light materials

Post by galinette » Fri Feb 05, 2010 3:48 am

Here is the LCD monitor, the first measured by myself!

Etienne
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Ewie
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Re: Many new light materials

Post by Ewie » Sun Mar 14, 2010 12:23 pm

Great emission materials, than ks for sharing but I'm a little confused. I've downloaded the LED Blue version into Skindigo materials editor but it renders as neutral grey?? Not sure what's happening.. any suggestions?

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cholme
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Re: Many new light materials

Post by cholme » Fri May 28, 2010 5:44 am

It seems like certain materials don't work well with SketchUp. I get the following error message on both candle flame and butane flame.
"Unsupported attribute regular_tabulated found. Material cannot be loaded. To use this material, create a Linked IGM material that is linked to this IGM file."

I have no idea what this means or how to fix it. Forgive my ignorance, I am just learning.

Any advice would be greatly appreciated.

Chris

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galinette
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Re: Many new light materials

Post by galinette » Fri May 28, 2010 5:59 am

Some programs like sketchup do not support the spectral data capabilities of Indigo (they only accept RGB). This means that they will not open them. However, it's not possible to remove the spectral data without loosing what makes these light sources interesting.

The workaround in sketchup is to create a "Linked IGM" material in the sketchup material editor tool. This special material has only one parameter : the path to an .igm or .pigm file. It will then use the material defined in this file to render the scene. This is a kind of "pointer" on an external igm file. The link will not be resolved by sketchup but only by Indigo when you render.

Etienne
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galinette
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Re: Many new light materials

Post by galinette » Fri May 28, 2010 6:00 am

By the way, this is an annoying problem in sketchup. When opening an unrecognized material, it should let the choice of keeping the raw material code without trying to understand it.
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Headroom
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Re: Many new light materials

Post by Headroom » Fri May 28, 2010 7:04 am

Another thing that should be mentioned here is that SkIndigo is "only" an exporter. You'll really get an insight into how Indigo works if you open the files that the exporter creates to feed Indigo.

While not convenient, once you understand these files (refer to the Indigo Technical Manual), you can unleash any feature of Indigo regardless if a particular exporter supports that particular feature or not.

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Whaat
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Re: Many new light materials

Post by Whaat » Fri May 28, 2010 4:46 pm

galinette wrote:By the way, this is an annoying problem in sketchup. When opening an unrecognized material, it should let the choice of keeping the raw material code without trying to understand it.
Hey galinette, I don't quite understand what you mean. How do you suggest the raw material code is 'kept'?

(BTW, I'm currently working on support for tabulated spectral data in SkIndigo... :) )

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galinette
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Re: Many new light materials

Post by galinette » Sat May 29, 2010 6:11 am

When sketchup does not manage to parse a material correctly (because it does not support all tags for instance), it should propose to open it as raw xml without trying to understand it. Then, when exporting the igs scene, sketchup should use the raw xml material description, so that all material properties are kept.

Alternatively, it could say : "Hey, I'm not able to parse your material. Do you want to create a linked igm on it instead?"

Etienne
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CTZn
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Re: Many new light materials

Post by CTZn » Sat May 29, 2010 11:32 am

cholme wrote:"Unsupported attribute regular_tabulated found. Material cannot be loaded. To use this material, create a Linked IGM material that is linked to this IGM file."
You probably missed that Galinette :)

I understand your proposition: if the exporter can't interpret the material data, it should assume that Indigo will and let it pass through export.
obsolete asset

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jarmenkell
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Re: Many new light materials

Post by jarmenkell » Wed Jul 21, 2010 11:46 pm

the red laser material also makes my Cinema crash (and burn=)

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